From e99c53fb3be56eb4c685dd061eef0e5b5bf22b73 Mon Sep 17 00:00:00 2001
From: Benjamin Auder <benjamin.auder@somewhere>
Date: Sat, 27 Jan 2018 18:46:20 +0100
Subject: [PATCH] First commit

---
 .gitattributes                             |    5 +
 .gitfat                                    |    2 +
 .gitignore                                 |    4 +
 LICENSE                                    |   15 +
 README.md                                  |   66 +
 TODO_assessment_template                   |   36 +
 app.js                                     |   58 +
 bin/www                                    |  107 +
 config/parameters.js.dist                  |   36 +
 entities/assessment.js                     |  184 +
 entities/course.js                         |  100 +
 entities/user.js                           |  146 +
 gulpfile.js                                |   19 +
 models/assessment.js                       |   85 +
 models/course.js                           |   74 +
 models/user.js                             |   60 +
 package-lock.json                          | 5833 ++++++++++++++++++++
 package.json                               |   34 +
 public/favicon/LICENSE                     |    3 +
 public/favicon/android-chrome-192x192.png  |    1 +
 public/favicon/android-chrome-512x512.png  |    1 +
 public/favicon/apple-touch-icon.png        |    1 +
 public/favicon/browserconfig.xml           |    9 +
 public/favicon/favicon-16x16.png           |    1 +
 public/favicon/favicon-32x32.png           |    1 +
 public/favicon/favicon.ico                 |    1 +
 public/favicon/manifest.json               |   18 +
 public/favicon/mstile-150x150.png          |    1 +
 public/favicon/safari-pinned-tab.svg       |    1 +
 public/javascripts/assessment.js           |  415 ++
 public/javascripts/course.js               |  360 ++
 public/javascripts/courseList.js           |   69 +
 public/javascripts/login.js                |   89 +
 public/javascripts/monitor.js              |   11 +
 public/javascripts/utils/dialog.js         |   30 +
 public/javascripts/utils/sha1.js           |  124 +
 public/javascripts/utils/socketMessages.js |   10 +
 public/javascripts/utils/validation.js     |  241 +
 public/stylesheets/assessment.css          |   55 +
 public/stylesheets/course.css              |   56 +
 public/stylesheets/courseList.css          |    3 +
 public/stylesheets/index.css               |    3 +
 public/stylesheets/layout.css              |    3 +
 public/stylesheets/login.css               |   22 +
 public/stylesheets/monitor.css             |    1 +
 public/vendor/prism/prism-components.zip   |    1 +
 public/vendor/prism/prism.css              |  140 +
 public/vendor/prism/prism.js               |    7 +
 routes/all.js                              |   11 +
 routes/assessments.js                      |   96 +
 routes/courses.js                          |   77 +
 routes/pages.js                            |  136 +
 routes/users.js                            |  117 +
 setup/README                               |   24 +
 setup/database.js                          |   13 +
 setup/students.sample.csv                  |   28 +
 sockets.js                                 |   87 +
 utils/access.js                            |   55 +
 utils/database.js                          |    9 +
 utils/mailer.js                            |   42 +
 utils/tokenGenerator.js                    |   18 +
 views/assessment.pug                       |   66 +
 views/course-list.pug                      |   48 +
 views/course.pug                           |  197 +
 views/enable-js.pug                        |    4 +
 views/error.pug                            |   11 +
 views/index.pug                            |   19 +
 views/layout.pug                           |   60 +
 views/login.pug                            |   33 +
 views/monitor.pug                          |   12 +
 views/no-devtools.pug                      |    5 +
 views/withQuestions.pug                    |   20 +
 72 files changed, 9730 insertions(+)
 create mode 100644 .gitattributes
 create mode 100644 .gitfat
 create mode 100644 .gitignore
 create mode 100644 LICENSE
 create mode 100644 README.md
 create mode 100644 TODO_assessment_template
 create mode 100644 app.js
 create mode 100755 bin/www
 create mode 100644 config/parameters.js.dist
 create mode 100644 entities/assessment.js
 create mode 100644 entities/course.js
 create mode 100644 entities/user.js
 create mode 100644 gulpfile.js
 create mode 100644 models/assessment.js
 create mode 100644 models/course.js
 create mode 100644 models/user.js
 create mode 100644 package-lock.json
 create mode 100644 package.json
 create mode 100644 public/favicon/LICENSE
 create mode 100644 public/favicon/android-chrome-192x192.png
 create mode 100644 public/favicon/android-chrome-512x512.png
 create mode 100644 public/favicon/apple-touch-icon.png
 create mode 100644 public/favicon/browserconfig.xml
 create mode 100644 public/favicon/favicon-16x16.png
 create mode 100644 public/favicon/favicon-32x32.png
 create mode 100644 public/favicon/favicon.ico
 create mode 100644 public/favicon/manifest.json
 create mode 100644 public/favicon/mstile-150x150.png
 create mode 100644 public/favicon/safari-pinned-tab.svg
 create mode 100644 public/javascripts/assessment.js
 create mode 100644 public/javascripts/course.js
 create mode 100644 public/javascripts/courseList.js
 create mode 100644 public/javascripts/login.js
 create mode 100644 public/javascripts/monitor.js
 create mode 100644 public/javascripts/utils/dialog.js
 create mode 100644 public/javascripts/utils/sha1.js
 create mode 100644 public/javascripts/utils/socketMessages.js
 create mode 100644 public/javascripts/utils/validation.js
 create mode 100644 public/stylesheets/assessment.css
 create mode 100644 public/stylesheets/course.css
 create mode 100644 public/stylesheets/courseList.css
 create mode 100644 public/stylesheets/index.css
 create mode 100644 public/stylesheets/layout.css
 create mode 100644 public/stylesheets/login.css
 create mode 100644 public/stylesheets/monitor.css
 create mode 100644 public/vendor/prism/prism-components.zip
 create mode 100644 public/vendor/prism/prism.css
 create mode 100644 public/vendor/prism/prism.js
 create mode 100644 routes/all.js
 create mode 100644 routes/assessments.js
 create mode 100644 routes/courses.js
 create mode 100644 routes/pages.js
 create mode 100644 routes/users.js
 create mode 100644 setup/README
 create mode 100644 setup/database.js
 create mode 100644 setup/students.sample.csv
 create mode 100644 sockets.js
 create mode 100644 utils/access.js
 create mode 100644 utils/database.js
 create mode 100644 utils/mailer.js
 create mode 100644 utils/tokenGenerator.js
 create mode 100644 views/assessment.pug
 create mode 100644 views/course-list.pug
 create mode 100644 views/course.pug
 create mode 100644 views/enable-js.pug
 create mode 100644 views/error.pug
 create mode 100644 views/index.pug
 create mode 100644 views/layout.pug
 create mode 100644 views/login.pug
 create mode 100644 views/monitor.pug
 create mode 100644 views/no-devtools.pug
 create mode 100644 views/withQuestions.pug

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..53b9f2c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,5 @@
+*.pdf filter=fat
+*.zip filter=fat
+*.tar.xz filter=fat
+*.png filter=fat
+*.ico filter=fat
diff --git a/.gitfat b/.gitfat
new file mode 100644
index 0000000..f20d0fb
--- /dev/null
+++ b/.gitfat
@@ -0,0 +1,2 @@
+[rsync]
+remote = gitfat@auder.net:~/files/qomet
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d29bf32
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/node_modules/
+*.swp
+/config/parameters.js
+/public/vendor/prism/components/
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..ee75e4c
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,15 @@
+ISC License
+
+Copyright (c) 2018, Benjamin Auder
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d79ff0d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,66 @@
+# qomet
+
+### Questions Ouvertes ou à options Multiples pour l'Évaluation des éTudiants
+
+Or "... pour Examens sur inTernet", in french.
+
+In english, just revert the acronym:
+"sTudents Evaluation with Multiple chOices or Open Questions (or ...inTernet Exams with).
+
+## Features
+
+Allow teachers to create courses, containing assessments. Each of them can be public, or
+restricted to a classroom (identification by student ID).
+Individual answers to an exam are monitored in real time, and feedback is sent
+to each participant in the end (answers, computing grade).
+Once a series of exam is over, the teacher can get all grades in CSV format from course page.
+
+*Note:* for now the monitoring + socket part is still unimplemented,
+and exams composition is limited to single question exercises.
+
+## Installation
+
+See setup/README
+
+## Usage
+
+TODO: write tutorial, maybe a demo video.
+
+*Note about exams:*
+Once an assessment is started, it's impossible to quit and restart using another browser,
+because a password stored in cookies need to be sent with every request.
+So under normal circumstances it's also impossible for a student to continue the exam of another.
+(The password is destroyed when exam ends or when the teacher decide to finish assessment).
+
+## Limitations
+
+Version "standard classroom": some potential cheating ways,
+ - headless browsers with renamed http-user-agent; difficult to counter with 100% confidence
+ - block JS script using e.g. μblock, then re-inject the script cleaned of listeners
+ - intercept HTTP response to "start quiz" signal, re-compose the page without listeners and run
+
+The only way to garanty 0 internet cheat is to use some SELinux configuration in kiosk mode
+with just one safe web browser enabled, e.g. [surf](https://surf.suckless.org/).
+Not that more traditional ways of cheating may still be used (phones, talking, signs, memos...)
+
+## Alternative softwares
+
+ * [moodle](https://moodle.org)<br/>
+  Full-featured (open source!) project to manage learning activities.
+  Too big for my purpose; however qomet might be re-thought as a moodle plugin
+  (although [at least one](https://moodle.org/plugins/mod_exam) already exists for this task).
+
+ * [evalbox](https://evalbox.com/)<br/>
+  The closest to my goals, but only for simple quizzes, and not actively developed anymore.
+
+ * [wims](http://wims.unice.fr/~wims/)<br/>
+  Full-featured (and open source) training center for students, with various types of exercises,
+  possibly in exam mode too.
+  The spirit, however, is more "enhanced homework" than "internet exams".
+
+ * [socrative](https://socrative.com/)<br/>
+  Nice looking realtime feedback (lacking in evalbox), but thought for interactive classes.
+  In this perspective, I also found [educaplay](https://www.educaplay.com) appealing.
+
+ * [testmoz](https://testmoz.com/)<br/>
+  Old-fashioned look, lacking some features. Still interesting to set-up a quick test.
diff --git a/TODO_assessment_template b/TODO_assessment_template
new file mode 100644
index 0000000..f44a163
--- /dev/null
+++ b/TODO_assessment_template
@@ -0,0 +1,36 @@
+TODO: format général TXT: (compilé en JSON)
+
+10 (time)
+1 (fixed)
+Introduction (multiline, from third line ; \n --> <br>)
+
+[Intro q1, multiline]
+
+q1 txt
+
+answer q1 (multiline txt)
+
+q2 intro (multiline)
+
+  q2.1 [intro optional]
+
+	q2.1 txt
+
+	q2.1 options:
+	+ good
+	- bad
+	- bad ...etc
+
+	answer (integer array, one line)
+
+  q2.2 [intro optional]
+
+	q2.2 txt
+
+	answer (html multiline)
+
+Conclusion (last block)
+
+=====
+
+Seems that GUI would be easier, then summary in YAML file + parse from YAML
diff --git a/app.js b/app.js
new file mode 100644
index 0000000..7dc3b41
--- /dev/null
+++ b/app.js
@@ -0,0 +1,58 @@
+const express = require('express');
+const app = express();
+const path = require('path');
+const cookieParser = require('cookie-parser');
+const favicon = require('serve-favicon');
+const logger = require('morgan');
+const bodyParser = require('body-parser');
+const params = require(path.join(__dirname, "config", "parameters"));
+
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'pug');
+app.use(favicon(path.join(__dirname, "public", "favicon", "favicon.ico")));
+if (app.get('env') === 'development')
+{
+	// Full logging in development mode
+	app.use(logger('dev'));
+}
+else
+{
+	app.set('trust proxy', true); //http://dev.rdybarra.com/2016/06/23/Production-Logging-With-Morgan-In-Express/
+	// In prod, only log error responses (https://github.com/expressjs/morgan)
+	app.use(logger('combined', {
+		skip: function (req, res) { return res.statusCode < 400 }
+	}));
+}
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+// Before any request, check cookies
+app.use(function(req, res, next) {
+	res.locals.loggedIn = !!req.cookies.token;
+	res.locals.myInitials = req.cookies.myInitials; //may be undefined
+	next();
+});
+
+// Routing
+let routes = require(path.join(__dirname, "routes", "all"));
+app.use("/", routes);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  let err = new Error('Not Found');
+  err.status = 404;
+  next(err);
+});
+
+// Error handler
+app.use(function(err, req, res, next) {
+  // Set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get('env') === 'development' ? err : {};
+  res.status(err.status || 500);
+  res.render('error');
+});
+
+module.exports = app;
diff --git a/bin/www b/bin/www
new file mode 100755
index 0000000..c964949
--- /dev/null
+++ b/bin/www
@@ -0,0 +1,107 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+let port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+let server = http.createServer(app);
+
+/*
+ * CRON tasks
+ */
+
+var cron = require('node-cron');
+var UserModel = require("../models/user");
+cron.schedule('0 0 0 * * *', function() {
+	// Remove unlogged users every 24h
+	UserModel.cleanUsersDb();
+});
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+let io = require('socket.io').listen(server); //sockets too
+//https://stackoverflow.com/a/24610678/4640434
+
+/*
+ * Sockets handling
+ */
+
+require('../sockets')(io);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val)
+{
+  let port = parseInt(val, 10);
+
+  if (isNaN(port)) // named pipe
+    return val;
+
+  if (port >= 0) // port number
+    return port;
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error)
+{
+  if (error.syscall !== 'listen')
+    throw error;
+
+  let bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code)
+	{
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening()
+{
+  let addr = server.address();
+  let bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  console.log('Listening on ' + bind);
+}
diff --git a/config/parameters.js.dist b/config/parameters.js.dist
new file mode 100644
index 0000000..ae0073d
--- /dev/null
+++ b/config/parameters.js.dist
@@ -0,0 +1,36 @@
+var Parameters = {};
+
+// For mail sending. WARNING: *no trailng slash*
+Parameters.siteURL = "http://localhost";
+
+// Lifespan of a (login) cookie
+Parameters.cookieExpire = 183*24*3600*1000; //6 months in milliseconds
+
+// Characters in a login token, and period of validity (in milliseconds)
+Parameters.token = {
+	length: 16,
+	expire: 1000*60*30, //30 minutes in milliseconds
+};
+
+// Whitelist of emails (full addresses or suffixes). Leave blank to accept all
+Parameters.whitelist = [
+	"some.email@some.domain.com",
+	"another.domain.org",
+];
+
+// msmtp account name adn address from, to send (login) emails
+Parameters.mail = {
+	account: "msmtpAccount",
+	from: "addressFrom",
+};
+
+// Database settings: see https://docs.mongodb.com/manual/reference/connection-string/
+Parameters.db = {
+	user: "username",
+	password: "password",
+	host: "localhost",
+	port: "27017",
+	name: "dbname",
+};
+
+module.exports = Parameters;
diff --git a/entities/assessment.js b/entities/assessment.js
new file mode 100644
index 0000000..2104193
--- /dev/null
+++ b/entities/assessment.js
@@ -0,0 +1,184 @@
+const db = require("../utils/database");
+
+const AssessmentEntity =
+{
+	/*
+	 * Structure:
+	 *   _id: BSON id
+	 *   cid: course ID
+	 *   name: varchar
+	 *   active: boolean true/false
+	 *   mode: secure | exam | open (decreasing security)
+	 *   fixed: bool (questions in fixed order; default: false)
+	 *   display: "one" or "all" (generally "all" for open questions, but...)
+	 *   time: 0, //<=0 means "untimed"; otherwise, time in seconds
+	 *   introduction: "",
+	 *   conclusion: "https://www.youtube.com/watch?v=6-9AjToJYuw",
+	 *   coefficient: number, default 1
+	 *   questions: array of
+	 *     index: for paper test, like 2.1.a (?!); and quiz: 0, 1, 2, 3...
+	 *     wording: varchar (HTML)
+	 *     options: array of varchar --> if present, question type == quiz!
+	 *     fixed: bool, options in fixed order (default: false)
+	 *     answer: array of integers (for quiz) or html text (for paper); striped in exam mode
+	 *     active: boolean, is question in current assessment? --> striped if inactive!
+	 *     points: points for this question (default 1)
+	 *   papers : array of
+	 *     number: student number
+	 *     inputs: array of indexed arrays of integers (or html text if not quiz)
+	 *     startTime, endTime
+	 *     password: random string identifying student for exam session TEMPORARY
+	 */
+
+	getById: function(aid, callback)
+	{
+		db.assessments.findOne(
+			{ _id: aid },
+			callback
+		);
+	},
+
+	getByPath: function(cid, name, callback)
+	{
+		db.assessments.findOne(
+			{
+				cid: cid,
+				name: name,
+			},
+			callback
+		);
+	},
+
+	insert: function(cid, name, callback)
+	{
+		db.assessments.insert(
+			{
+				name: name,
+				cid: cid,
+				active: false,
+				mode: "exam",
+				fixed: false,
+				display: "one",
+				time: 0,
+				introduction: "",
+				conclusion: "",
+				coefficient: 1,
+				questions: [ ],
+				papers: [ ],
+			},
+			callback
+		);
+	},
+
+	getByCourse: function(cid, callback)
+	{
+		db.assessments.find(
+			{ cid: cid },
+			callback
+		);
+	},
+
+	// arg: full assessment without _id field
+	replace: function(aid, assessment, cb)
+	{
+		// Should be: (but unsupported by mongojs)
+//		db.assessments.replaceOne(
+//			{ _id: aid },
+//			assessment,
+//			cb
+//		);
+		// Temporary workaround:
+		db.assessments.update(
+			{ _id: aid },
+			{ $set: assessment },
+			cb
+		);
+	},
+
+	getQuestions: function(aid, callback)
+	{
+		db.assessments.findOne(
+			{ _id: aid },
+			{ questions: 1},
+			(err,res) => {
+				callback(err, !!res ? res.questions : null);
+			}
+		);
+	},
+
+	startSession: function(aid, number, password, callback)
+	{
+		// TODO: security, do not re-do tasks if already done
+		db.assessments.update(
+			{ _id: aid },
+			{ $push: { papers: {
+				number: number,
+				startTime: Date.now(),
+				endTime: undefined,
+				password: password,
+				inputs: [ ], //TODO: this is stage 1, stack indexed answers.
+				// then build JSON tree for easier access / correct
+			}}},
+			callback
+		);
+	},
+
+	// https://stackoverflow.com/questions/27874469/mongodb-push-in-nested-array
+	setInput: function(aid, number, password, input, callback) //input: index + arrayOfInt (or txt)
+	{
+		db.assessments.update(
+			{
+				_id: aid,
+				"papers.number": number,
+				"papers.password": password,
+			},
+			{ $push: { "papers.$.inputs": input } },
+			callback
+		);
+	},
+
+	endAssessment: function(aid, number, password, callback)
+	{
+		db.assessments.update(
+			{
+				_id: aid,
+				"papers.number": number,
+				"papers.password": password,
+			},
+			{ $set: {
+				"papers.$.endTime": Date.now(),
+				"papers.$.password": "",
+			} },
+			callback
+		);
+	},
+
+	getConclusion: function(aid, callback)
+	{
+		db.assessments.findOne(
+			{ _id: aid },
+			{ conclusion: 1},
+			(err,res) => {
+				callback(err, !!res ? res.conclusion : null);
+			}
+		);
+	},
+
+	remove: function(aid, cb)
+	{
+		db.assessments.remove(
+			{ _id: aid },
+			cb
+		);
+	},
+
+	removeGroup: function(cid, cb)
+	{
+		db.assessments.remove(
+			{ cid: cid },
+			cb
+		);
+	},
+}
+
+module.exports = AssessmentEntity;
diff --git a/entities/course.js b/entities/course.js
new file mode 100644
index 0000000..66fcaee
--- /dev/null
+++ b/entities/course.js
@@ -0,0 +1,100 @@
+const db = require("../utils/database");
+
+const CourseEntity =
+{
+	/*
+	 * Structure:
+	 *   _id: BSON id
+	 *   uid: prof ID
+	 *   code: varchar
+	 *   description: varchar
+	 *   password: monitoring password hash
+	 *   students: array of
+	 *     number: student number
+	 *     forename: varchar
+	 *     name: varchar
+	 *     group: integer
+	 */
+
+	getByUser: function(uid, callback)
+	{
+		db.courses.find(
+			{ uid: uid },
+			callback
+		);
+	},
+
+	getById: function(cid, callback)
+	{
+		db.courses.findOne(
+			{ _id: cid },
+			callback
+		);
+	},
+
+	getByPath: function(uid, code, callback)
+	{
+		db.courses.findOne(
+			{
+				$and: [
+					{ uid: uid },
+					{ code: code },
+				]
+			},
+			callback
+		);
+	},
+
+	insert: function(uid, code, description, cb)
+	{
+		db.courses.insert(
+			{
+				uid: uid,
+				code: code,
+				description: description,
+				students: [ ],
+			},
+			cb);
+	},
+
+	setStudents: function(cid, students, cb)
+	{
+		db.courses.update(
+			{ _id: cid },
+			{ $set: { students: students } },
+			cb
+		);
+	},
+
+	// Note: return { students: { ... } }, pointing on the requested row
+	getStudent: function(cid, number, cb)
+	{
+		db.courses.findOne(
+			{ _id: cid },
+			{
+				_id: 0,
+				students: { $elemMatch: {number: number} }
+			},
+			cb
+		);
+	},
+
+	setPassword: function(cid, pwd, cb)
+	{
+		db.courses.update(
+			{ _id: cid },
+			{ $set: { password: pwd } },
+			cb
+		);
+	},
+
+	remove: function(cid, cb)
+	{
+		db.courses.remove(
+			{ _id: cid },
+			cb
+		);
+	},
+}
+
+module.exports = CourseEntity;
diff --git a/entities/user.js b/entities/user.js
new file mode 100644
index 0000000..1026eaf
--- /dev/null
+++ b/entities/user.js
@@ -0,0 +1,146 @@
+const db = require("../utils/database");
+
+const UserEntity =
+{
+	/*
+	 * Structure:
+	 *   _id: BSON id
+	 *   ** Strings, identification informations:
+	 *   email
+	 *   forename
+	 *   name
+	 *   initials : computed, Benjamin Auder --> ba ...etc
+	 *   loginToken: {
+	 *     value: string
+	 *     timestamp: datetime (validity)
+	 *     ip: address of requesting machine
+	 *   }
+	 *   sessionTokens (array): cookie identification
+	 */
+
+	getInitialsByPrefix: function(prefix, cb)
+	{
+		db.users.find(
+			{ initials: new RegExp("^" + prefix) },
+			{ initials: 1, _id: 0 },
+			cb
+		);
+	},
+
+	insert: function(newUser, cb)
+	{
+		db.users.insert(Object.assign({},
+			newUser,
+			{
+				loginToken: { },
+				sessionTokens: [ ],
+			}),
+			cb
+		);
+	},
+
+	getByLoginToken: function(token, cb)
+	{
+		db.users.findOne(
+			{ "loginToken.value": token },
+			cb
+		);
+	},
+
+	getBySessionToken: function(token, cb)
+	{
+		db.users.findOne(
+			{ sessionTokens: token},
+			cb
+		);
+	},
+
+	getById: function(uid, cb)
+	{
+		db.users.findOne(
+			{ _id: uid },
+			cb
+		);
+	},
+
+	getByEmail: function(email, cb)
+	{
+		db.users.findOne(
+			{ email: email },
+			cb
+		);
+	},
+
+	getByInitials: function(initials, cb)
+	{
+		db.users.findOne(
+			{ initials: initials },
+			cb
+		);
+	},
+
+	getUnlogged: function(cb)
+	{
+		var tsNow = new Date().getTime();
+		// 86400000 = 24 hours in milliseconds
+		var day = 86400000;
+		db.users.find({}, (err,userArray) => {
+			let unlogged = userArray.filter( u => {
+				return u.sessionTokens.length==0 && u._id.getTimestamp().getTime() + day < tsNow;
+			});
+			cb(err, unlogged);
+		});
+	},
+
+	getAll: function(cb)
+	{
+		db.users.find({}, cb);
+	},
+
+	setLoginToken: function(token, uid, ip, cb)
+	{
+		db.users.update(
+			{ _id: uid },
+			{ $set: { loginToken: {
+					value: token,
+					timestamp: new Date().getTime(),
+					ip: ip,
+				}}
+			},
+			cb
+		);
+	},
+
+	setSessionToken: function(token, uid, cb)
+	{
+		// Also empty the login token to invalidate future attempts
+		db.users.update(
+			{ _id: uid },
+			{
+				$set: { loginToken: {} },
+				$push: { sessionTokens: {
+					$each: [token],
+					$slice: -7 //only allow 7 simultaneous connections per user (TODO?)
+				}}
+			},
+			cb
+		);
+	},
+
+	removeToken: function(uid, token, cb)
+	{
+		db.users.update(
+			{ _id: uid },
+			{ $pull: {sessionTokens: token} },
+			cb
+		);
+	},
+
+	// TODO: later, allow account removal
+	remove: function(uids)
+	{
+		db.users.remove({_id: uids});
+	},
+}
+
+module.exports = UserEntity;
diff --git a/gulpfile.js b/gulpfile.js
new file mode 100644
index 0000000..a1286c5
--- /dev/null
+++ b/gulpfile.js
@@ -0,0 +1,19 @@
+var gulp = require('gulp');
+var nodemon = require('gulp-nodemon'); //reload server on changes
+
+var nodemonOptions = {
+	script: 'bin/www',
+	ext: 'js',
+	env: { 'NODE_ENV': 'development' },
+	verbose: true,
+	watch: ['./','config','utils','routes','models','entities']
+};
+
+// TODO: tasks for uglify / sass / use webpack
+
+gulp.task('server', function () {
+	nodemon(nodemonOptions)
+	.on('restart', function () {
+		console.log('restarted!')
+	});
+});
diff --git a/models/assessment.js b/models/assessment.js
new file mode 100644
index 0000000..3f89cc9
--- /dev/null
+++ b/models/assessment.js
@@ -0,0 +1,85 @@
+const AssessmentEntity = require("../entities/assessment");
+const CourseEntity = require("../entities/course");
+const ObjectId = require("bson-objectid");
+const UserEntity = require("../entities/user");
+const TokenGen = require("../utils/tokenGenerator");
+
+const AssessmentModel =
+{
+	getByRefs: function(initials, code, name, cb)
+	{
+		UserEntity.getByInitials(initials, (err,user) => {
+			if (!!err || !user)
+				return cb(err || {errmsg: "User not found"});
+			CourseEntity.getByPath(user._id, code, (err2,course) => {
+				if (!!err2 || !course)
+					return cb(err2 || {errmsg: "Course not found"});
+				AssessmentEntity.getByPath(course._id, name, (err3,assessment) => {
+					if (!!err3 || !assessment)
+						return cb(err3 || {errmsg: "Assessment not found"});
+					cb(null,assessment);
+				});
+			});
+		});
+	},
+
+	add: function(uid, cid, name, cb)
+	{
+		// 1) Check that course is owned by user of ID uid
+		CourseEntity.getById(cid, (err,course) => {
+			if (!!err || !course)
+				return cb({errmsg: "Course retrieval failure"});
+			if (!course.uid.equals(uid))
+				return cb({errmsg:"Not your course"},undefined);
+			// 2) Insert new blank assessment
+			AssessmentEntity.insert(cid, name, cb);
+		});
+	},
+
+	update: function(uid, assessment, cb)
+	{
+		const qid = ObjectId(assessment._id);
+		// 1) Check that assessment is owned by user of ID uid
+		AssessmentEntity.getById(qid, (err,assessmentOld) => {
+			if (!!err || !assessmentOld)
+				return cb({errmsg: "Assessment retrieval failure"});
+			CourseEntity.getById(ObjectId(assessmentOld.cid), (err2,course) => {
+				if (!!err2 || !course)
+					return cb({errmsg: "Course retrieval failure"});
+				if (!course.uid.equals(uid))
+					return cb({errmsg:"Not your course"},undefined);
+				// 2) Replace assessment
+				delete assessment["_id"];
+				assessment.cid = ObjectId(assessment.cid);
+				AssessmentEntity.replace(qid, assessment, cb);
+			});
+		});
+	},
+
+	// Set password in responses collection
+	startSession: function(aid, number, cb)
+	{
+		const password = TokenGen.generate(12); //arbitrary number, 12 seems enough...
+		AssessmentEntity.getQuestions(aid, (err,questions) => {
+			AssessmentEntity.startSession(aid, number, password, (err2,ret) => {
+				cb(err, {
+					questions: questions,
+					password: password,
+				});
+			});
+		});
+	},
+
+	endSession: function(aid, number, password, cb)
+	{
+		AssessmentEntity.endAssessment(aid, number, password, (err,ret) => {
+			if (!!err || !ret)
+				return cb(err,ret);
+			AssessmentEntity.getConclusion(aid, (err2,conclusion) => {
+				cb(err2, {conclusion:conclusion});
+			});
+		});
+	},
+};
+
+module.exports = AssessmentModel;
diff --git a/models/course.js b/models/course.js
new file mode 100644
index 0000000..53419c1
--- /dev/null
+++ b/models/course.js
@@ -0,0 +1,74 @@
+const CourseEntity = require("../entities/course");
+const UserEntity = require("../entities/user");
+const AssessmentEntity = require("../entities/assessment");
+
+const CourseModel =
+{
+	getByInitials: function(initials, callback)
+	{
+		UserEntity.getByInitials(initials, (err,user) => {
+			if (!!err || !user)
+				callback(err, []);
+			else
+			{
+				CourseEntity.getByUser(user._id, (err2,courseArray) => {
+					callback(err2, courseArray);
+				});
+			}
+		});
+	},
+
+	getByRefs: function(initials, code, callback)
+	{
+		UserEntity.getByInitials(initials, (err,user) => {
+			if (!!err || !user)
+				callback(err, []);
+			else
+			{
+				CourseEntity.getByPath(user._id, code, (err2,course) => {
+					callback(err2, course);
+				});
+			}
+		});
+	},
+
+	importStudents: function(uid, cid, students, cb)
+	{
+		// 1) check if uid == course uid
+		CourseEntity.getById(cid, (err,course) => {
+			if (!!err || !course || !course.uid.equals(uid))
+				return cb({errmsg:"Not your course"},{});
+			// 2) Set students
+			CourseEntity.setStudents(cid, students, cb);
+		});
+	},
+
+	setPassword: function(uid, cid, pwd, cb)
+	{
+		// 1) check if uid == course uid
+		CourseEntity.getById(cid, (err,course) => {
+			if (!!err || !course || !course.uid.equals(uid))
+				return cb({errmsg:"Not your course"},{});
+			// 2) Insert new student (overwrite if number already exists)
+			CourseEntity.setPassword(cid, pwd, cb);
+		});
+	},
+
+	remove: function(uid, cid, cb)
+	{
+		// 1) check if uid == course uid
+		CourseEntity.getById(cid, (err,course) => {
+			if (!!err || !course || !course.uid.equals(uid))
+				return cb({errmsg:"Not your course"},{});
+			// 2) remove all associated assessments
+			AssessmentEntity.removeGroup(cid, (err2,ret) => {
+				if (!!err)
+					return cb(err,{});
+				// 3) remove course (with its students)
+				CourseEntity.remove(cid, cb);
+			});
+		});
+	},
+}
+
+module.exports = CourseModel;
diff --git a/models/user.js b/models/user.js
new file mode 100644
index 0000000..f495bdc
--- /dev/null
+++ b/models/user.js
@@ -0,0 +1,60 @@
+const UserEntity = require("../entities/user");
+const params = require("../config/parameters");
+
+const UserModel =
+{
+	create: function(newUser, callback)
+	{
+		// Determine initials from forename+name
+		let forenameParts = newUser.forename.split(/[ -]+/);
+		let nameParts = newUser.name.split(/[ -]+/);
+		let initials =
+			forenameParts.map( n => { return n.charAt(0).toLowerCase(); }).join("") +
+			nameParts.map( n => { return n.charAt(0).toLowerCase(); }).join("");
+		// First retrieve all users with similar prefix initials
+		UserEntity.getInitialsByPrefix(initials, (err,userArray) => {
+			if (!!userArray && userArray.length == 1)
+				initials = initials + "2"; //thus number == users count for this hash
+			else if (!!userArray && userArray.length > 1)
+			{
+				// Pick the highest number after initials (if any), and increment
+				let numbers = userArray.map( u => {
+					let digitMatch = u.initials.match(/[0-9]/);
+					if (!digitMatch)
+						return 1; //irrelevant
+					let firstDigit = digitMatch.index;
+					return parseInt(u.initials.slice(digitMatch.index));
+				});
+				initials = initials + (Math.max(...numbers)+1);
+			}
+			Object.assign(newUser, {initials: initials});
+			UserEntity.insert(newUser, callback);
+		});
+	},
+
+	whitelistCheck: function(email)
+	{
+		if (params.whitelist.length == 0)
+			return true; //no whitelist, everyone allowed
+		for (let w of params.whitelist)
+		{
+			if ((w.indexOf('@') >= 0 && w==email) || !!email.match(new RegExp(w+"$")))
+				return true;
+		}
+		return false;
+	},
+
+	logout: function(uid, token, cb)
+	{
+		UserEntity.removeToken(uid, token, cb);
+	},
+
+	cleanUsersDb: function()
+	{
+		UserEntity.getUnlogged( (err,unlogged) => {
+			UserEntity.remove(unlogged);
+		});
+	},
+}
+
+module.exports = UserModel;
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..7cd2e0e
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,5833 @@
+{
+  "name": "qcm",
+  "version": "0.1.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
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+      "version": "1.1.1",
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+      "dev": true
+    },
+    "accepts": {
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+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.4.tgz",
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+        "negotiator": "0.6.1"
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+      "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo="
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+            "array-unique": "0.2.1",
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diff --git a/package.json b/package.json
new file mode 100644
index 0000000..01e7eb6
--- /dev/null
+++ b/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "qcm",
+  "version": "0.1.0",
+  "description": "QCM tool for exams",
+  "main": "bin/www",
+  "scripts": {
+    "start": "gulp server",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@auder.net:qcm"
+  },
+  "author": "Benjamin Auder",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^1.18.2",
+    "bson-objectid": "^1.2.2",
+    "cookie-parser": "^1.4.3",
+    "express": "^4.16.2",
+    "mongojs": "^2.4.1",
+    "morgan": "^1.9.0",
+    "node-cron": "^1.2.1",
+    "pug": "^2.0.0-rc.4",
+    "sanitize-html": "^1.16.3",
+    "serve-favicon": "^2.4.5",
+    "socket.io": "^2.0.4",
+    "underscore": "^1.8.3"
+  },
+  "devDependencies": {
+    "gulp": "^3.9.1",
+    "gulp-nodemon": "^2.2.1"
+  }
+}
diff --git a/public/favicon/LICENSE b/public/favicon/LICENSE
new file mode 100644
index 0000000..a76e70e
--- /dev/null
+++ b/public/favicon/LICENSE
@@ -0,0 +1,3 @@
+This favicon is generated from an iconscout icon, thus falling under the
+iconscout regular license https://iconscout.com/legal#licenses
+You can use it freely on your website, but (of course) not sell it
diff --git a/public/favicon/android-chrome-192x192.png b/public/favicon/android-chrome-192x192.png
new file mode 100644
index 0000000..8ec0b88
--- /dev/null
+++ b/public/favicon/android-chrome-192x192.png
@@ -0,0 +1 @@
+#$# git-fat bcd031181c55c67ab221bbfbd562f49a2c902137                 3725
diff --git a/public/favicon/android-chrome-512x512.png b/public/favicon/android-chrome-512x512.png
new file mode 100644
index 0000000..b14c7da
--- /dev/null
+++ b/public/favicon/android-chrome-512x512.png
@@ -0,0 +1 @@
+#$# git-fat 6fddf2e88ddc418b4b1e6c436dbaaf780bf2497b                 8261
diff --git a/public/favicon/apple-touch-icon.png b/public/favicon/apple-touch-icon.png
new file mode 100644
index 0000000..3b5e1b4
--- /dev/null
+++ b/public/favicon/apple-touch-icon.png
@@ -0,0 +1 @@
+#$# git-fat 6c5687f8cea00ad423475093f0854bce975baf8c                 3434
diff --git a/public/favicon/browserconfig.xml b/public/favicon/browserconfig.xml
new file mode 100644
index 0000000..28c1987
--- /dev/null
+++ b/public/favicon/browserconfig.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/favicon/mstile-150x150.png"/>
+            <TileColor>#00aba9</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>
diff --git a/public/favicon/favicon-16x16.png b/public/favicon/favicon-16x16.png
new file mode 100644
index 0000000..56089aa
--- /dev/null
+++ b/public/favicon/favicon-16x16.png
@@ -0,0 +1 @@
+#$# git-fat b45cbbb34d4b06f9b079197b17f98196ddc5dc92                  638
diff --git a/public/favicon/favicon-32x32.png b/public/favicon/favicon-32x32.png
new file mode 100644
index 0000000..623c953
--- /dev/null
+++ b/public/favicon/favicon-32x32.png
@@ -0,0 +1 @@
+#$# git-fat 5d804a72b035e65b9eec08b5dfb0a5dca5bf4edf                 1017
diff --git a/public/favicon/favicon.ico b/public/favicon/favicon.ico
new file mode 100644
index 0000000..ca71ccc
--- /dev/null
+++ b/public/favicon/favicon.ico
@@ -0,0 +1 @@
+#$# git-fat 40682600e89f78aca3ceabe47b3d057b4abd7396                15086
diff --git a/public/favicon/manifest.json b/public/favicon/manifest.json
new file mode 100644
index 0000000..9e4641d
--- /dev/null
+++ b/public/favicon/manifest.json
@@ -0,0 +1,18 @@
+{
+    "name": "",
+    "icons": [
+        {
+            "src": "/favicon/android-chrome-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "/favicon/android-chrome-512x512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#ffffff",
+    "background_color": "#ffffff",
+    "display": "standalone"
+}
\ No newline at end of file
diff --git a/public/favicon/mstile-150x150.png b/public/favicon/mstile-150x150.png
new file mode 100644
index 0000000..fdccdda
--- /dev/null
+++ b/public/favicon/mstile-150x150.png
@@ -0,0 +1 @@
+#$# git-fat 92f6a68050f68b6785ca67e80907474a5e1acaf2                 2609
diff --git a/public/favicon/safari-pinned-tab.svg b/public/favicon/safari-pinned-tab.svg
new file mode 100644
index 0000000..43b36f9
--- /dev/null
+++ b/public/favicon/safari-pinned-tab.svg
@@ -0,0 +1 @@
+<svg version="1" xmlns="http://www.w3.org/2000/svg" width="682.667" height="682.667" viewBox="0 0 512.000000 512.000000"><path d="M480.5 18.7c-88.8 51.9-164 93.9-204.5 114.1-30.7 15.4-37.5 18.1-41.6 16.7-4.9-1.8-6.9-5.7-7.2-14.9-.5-9.8 1.6-18.5 7.8-32.7 2.1-5.1 3.8-9.4 3.7-9.5-.6-.4-188.1 158.5-194.9 165.2-21.1 20.9-35.5 48.2-41.5 78.9-2.7 13.8-2.4 41.6.6 55.5 8.7 40.7 32.4 75.3 66.7 97.2 15 9.6 36.3 17.6 55.5 20.9 15.7 2.7 39.8 2.2 55.1-1 31.1-6.7 60.1-23.6 80.2-46.6 6.4-7.4 186.6-246.9 186.6-248 0-.3-5.1-.5-11.3-.5-14.3 0-20.7-1.7-26.1-7.1-3.7-3.7-3.8-4.2-3.3-8.7 1.9-16.3 35.7-80.7 89.4-170.5 8.5-14.2 15.3-26 15.1-26.2-.2-.2-13.8 7.5-30.3 17.2zm-30.8 44c-33.1 56.4-60.3 110.7-64.7 129.2-3.3 14.1 3.6 29.2 16.9 36.8 2.5 1.5 4.8 2.8 4.9 2.9.2.1-35.5 48.1-79.4 106.6-84.8 112.9-89.6 118.9-105.6 129.6-13.9 9.4-28.4 15.7-44.8 19.7-8.9 2.2-34.3 3.1-45.3 1.6-18-2.4-37.1-9.6-52.4-19.7-10.9-7.1-29-25.1-35.8-35.4-13.1-20.2-20.2-41.7-21.2-65-1.4-33.4 8.1-62.1 29.1-87.5 8.1-9.9 4.4-6.7 137.6-118.8l17.4-14.7 2.3 4.8c5.2 10.9 14.6 18 25.4 18.9 8.4.8 18.3-2.6 44.7-15.7 31.6-15.6 68.5-35.7 137.7-75.2C434.7 70.5 449.6 62 449.8 62c.2 0 .1.3-.1.7z"/><path d="M140 256.1c-49 4.1-88.5 41-96.5 90-6.6 40.9 11.6 82.6 46.1 105.5 30.3 20.1 66.8 23.8 100.8 10 19.3-7.8 39.9-25.4 50.3-43.1 25.7-43.4 19.3-96.3-15.8-131.4-22.5-22.6-52.9-33.7-84.9-31zm33.5 24.9c44.9 14.4 69.7 58.9 58 104-7.4 28.5-31.2 52.3-60.4 60.2-11.2 3.1-32.6 3.1-43.3.1-15.6-4.5-27.7-11.6-38.6-22.5-10.9-10.9-18-23-22.4-38.6-3-10.2-3.1-31.2-.4-41.7 8-30.9 31.9-54.8 62.4-62.5 11-2.8 34.5-2.3 44.7 1z"/></svg>
\ No newline at end of file
diff --git a/public/javascripts/assessment.js b/public/javascripts/assessment.js
new file mode 100644
index 0000000..1db80a0
--- /dev/null
+++ b/public/javascripts/assessment.js
@@ -0,0 +1,415 @@
+let socket = null; //monitor answers in real time
+
+function checkWindowSize()
+{
+	if (assessment.mode == "secure")
+	{
+		// NOTE: temporarily accept smartphone (security hole: pretend being a smartphone on desktop browser...)
+		if (navigator.userAgent.match(/(iPhone|iPod|iPad|Android|BlackBerry)/))
+			return true;
+		let test = () => {
+			return window.innerWidth < screen.width || window.innerHeight < screen.height;
+		};
+		const returnVal = test;
+		while (!test)
+			alert("Please enter fullscreen mode (F11)");
+		return returnVal;
+	}
+	return true;
+};
+
+function libsRefresh()
+{
+	$("#statements").find("code[class^=language-]").each( (i,elem) => {
+		Prism.highlightElement(elem);
+	});
+	MathJax.Hub.Queue(["Typeset",MathJax.Hub,"statements"]);
+};
+
+// TODO: if display == "all", les envois devraient être non définitifs (possibilité de corriger)
+// Et, blur sur une (sous-)question devrait envoyer la version courante de la sous-question
+
+let V = new Vue({
+	el: "#assessment",
+	data: {
+		assessment: assessment,
+		inputs: [ ], //student's answers
+		student: { }, //filled later
+		// Stage 0: unauthenticated (number),
+		//       1: authenticated (got a name, unvalidated)
+		//       2: locked: password set, exam started
+		//       3: completed
+		//       4: show answers
+		stage: assessment.mode != "open" ? 0 : 1,
+		remainingTime: 0, //global, in seconds
+	},
+	components: {
+		"statements": {
+			props: ['assessment','inputs','student','stage'],
+			data: function() {
+				return {
+					index: 0, //current question index in assessment.indices
+				};
+			},
+			mounted: function() {
+				if (assessment.mode != "secure")
+					return;
+				$("#warning").modal({
+					complete: () => {
+						this.stage = 2;
+						this.resumeAssessment();
+					},
+				});
+				window.addEventListener("blur", () => {
+					if (this.stage == 2)
+						this.showWarning();
+				}, false);
+				window.addEventListener("resize", e => {
+					if (this.stage == 2 && !checkWindowSize())
+						this.showWarning();
+				}, false);
+				//socket.on("disconnect", () => { }); //TODO: notify monitor (highlight red)
+			},
+			updated: function() {
+				libsRefresh();
+			},
+			// TODO: general render function for nested exercises
+			// TODO: with answer if stage==4 : class "wrong" if ticked AND stage==4 AND received answers
+			// class "right" if stage == 4 AND received answers (background-color: red / green)
+			// There should be a questions navigator below, or next (visible if display=='all')
+			// Full questions tree is rendered, but some parts hidden depending on display settings
+			render(h) {
+				let self = this;
+				let questions = assessment.questions.map( (q,i) => {
+					let questionContent = [ ];
+					questionContent.push(
+						h(
+							"div",
+							{
+								"class": {
+									"wording": true,
+								},
+								domProps: {
+									innerHTML: q.wording,
+								},
+							}
+						)
+					);
+					let optionsOrder = _.range(q.options.length);
+					if (!q.fixed)
+						optionsOrder = _.shuffle(optionsOrder);
+					let optionList = [ ];
+					optionsOrder.forEach( idx => {
+						let option = [ ];
+						option.push(
+							h(
+								"input",
+								{
+									domProps: {
+										checked: this.inputs[i][idx],
+									},
+									attrs: {
+										id: this.inputId(i,idx),
+										type: "checkbox",
+									},
+									on: {
+										change: e => { this.inputs[i][idx] = e.target.checked; },
+									},
+								},
+							)
+						);
+						option.push(
+							h(
+								"label",
+								{
+									domProps: {
+										innerHTML: q.options[idx],
+									},
+									attrs: {
+										"for": this.inputId(i,idx),
+									},
+								}
+							)
+						);
+						optionList.push(
+							h(
+								"div",
+								{
+									"class": {
+										option: true,
+										choiceCorrect: this.stage == 4 && assessment.questions[i].answer.includes(idx),
+										choiceWrong: this.stage == 4 && this.inputs[i][idx] && !assessment.questions[i].answer.includes(idx),
+									},
+								},
+								option
+							)
+						);
+					});
+					questionContent.push(
+						h(
+							"div",
+							{
+								"class": {
+									optionList: true,
+								},
+							},
+							optionList
+						)
+					);
+					return h(
+						"div",
+						{
+							"class": {
+								"question": true,
+								"hide": this.stage == 2 && assessment.display == 'one' && assessment.indices[this.index] != i,
+							},
+						},
+						questionContent
+					);
+				});
+				if (this.stage == 2)
+				{
+					// TODO: one button per question
+					questions.unshift(
+						h(
+							"button",
+							{
+								"class": {
+									"waves-effect": true,
+									"waves-light": true,
+									"btn": true,
+								},
+								on: {
+									click: () => this.sendAnswer(assessment.indices[this.index]),
+								},
+							},
+							"Send"
+						)
+					);
+				}
+				return h(
+					"div",
+					{
+						attrs: {
+							id: "statements",
+						},
+					},
+					questions
+				);
+			},
+			methods: {
+				// HELPERS:
+				inputId: function(i,j) {
+					return "q" + i + "_" + "input" + j;
+				},
+				showWarning: function(action) {
+					this.sendAnswer(assessment.indices[this.index]);
+					this.stage = 32; //fictive stage to hide all elements
+					$("#warning").modal('open');
+				},
+				// stage 2
+				sendAnswer: function(realIndex) {
+					if (this.index == assessment.questions.length - 1)
+						this.$emit("gameover");
+					else
+						this.index++;
+					if (assessment.mode == "open")
+						return; //only local
+					let answerData = {
+						aid: assessment._id,
+						answer: JSON.stringify({
+							index:realIndex.toString(),
+							input:this.inputs[realIndex]
+								.map( (tf,i) => { return {val:tf,idx:i}; } )
+								.filter( item => { return item.val; })
+								.map( item => { return item.idx; })
+						}),
+						number: this.student.number,
+						password: this.student.password,
+					};
+					$.ajax("/send/answer", {
+						method: "GET",
+						data: answerData,
+						dataType: "json",
+						success: ret => {
+							if (!!ret.errmsg)
+								return alert(ret.errmsg);
+							//socket.emit(message.newAnswer, answer);
+						},
+					});
+				},
+				// stage 2 after blur or resize
+				resumeAssessment: function() {
+					checkWindowSize();
+				},
+			},
+		},
+	},
+	mounted: function() {
+		window.addEventListener("keydown", e => {
+			// If F12 or ctrl+shift (ways to access devtools)
+			if (e.keyCode == 123 || (e.ctrlKey && e.shiftKey))
+				e.preventDefault();
+		}, false);
+		// Devtools detect based on https://jsfiddle.net/ebhjxfwv/4/
+		let div = document.createElement('div');
+		let devtoolsLoop = setInterval(
+			() => {
+				if (assessment.mode != "open")
+				{
+					console.log(div);
+					console.clear();
+				}
+			},
+			1000
+		);
+		Object.defineProperty(div, "id", {
+			get: () => {
+				clearInterval(devtoolsLoop);
+				if (assessment.mode != "open")
+				{
+					if (this.stage == 2)
+						this.endAssessment();
+					document.location.href = "/nodevtools";
+				}
+			}
+		});
+	},
+	computed: {
+		countdown: function() {
+			let seconds = this.remainingTime % 60;
+			let minutes = Math.floor(this.remainingTime / 60);
+			return this.padWithZero(minutes) + ":" + this.padWithZero(seconds);
+		},
+	},
+	methods: {
+		// HELPERS:
+		padWithZero: function(x) {
+			if (x < 10)
+				return "0" + x;
+			return x;
+		},
+		// stage 0 --> 1
+		getStudent: function(cb) {
+			$.ajax("/get/student", {
+				method: "GET",
+				data: {
+					number: this.student.number,
+					cid: assessment.cid,
+				},
+				dataType: "json",
+				success: s => {
+					if (!!s.errmsg)
+						return alert(s.errmsg);
+					this.stage = 1;
+					this.student = s.student;
+					Vue.nextTick( () => { Materialize.updateTextFields(); });
+					if (!!cb)
+						cb();
+				},
+			});
+		},
+		// stage 1 --> 0
+		cancelStudent: function() {
+			this.stage = 0;
+		},
+		// stage 1 --> 2 (get all questions, set password)
+		startAssessment: function() {
+			checkWindowSize();
+			let initializeStage2 = questions => {
+				$("#leftButton, #rightButton").hide();
+				if (assessment.time > 0)
+				{
+					this.remainingTime = assessment.time * 60;
+					this.runTimer();
+				}
+				// Initialize structured answer(s) based on questions type and nesting (TODO: more general)
+				if (!!questions)
+					assessment.questions = questions;
+				for (let q of assessment.questions)
+					this.inputs.push( _(q.options.length).times( _.constant(false) ) );
+				assessment.indices = assessment.fixed
+					? _.range(assessment.questions.length)
+					: _.shuffle( _.range(assessment.questions.length) );
+				this.stage = 2;
+				Vue.nextTick( () => { libsRefresh(); });
+			};
+			if (assessment.mode == "open")
+				return initializeStage2();
+			$.ajax("/start/assessment", {
+				method: "GET",
+				data: {
+					number: this.student.number,
+					aid: assessment._id
+				},
+				dataType: "json",
+				success: s => {
+					if (!!s.errmsg)
+						return alert(s.errmsg);
+					this.student.password = s.password;
+					// Got password: students answers locked to this page until potential teacher
+					// action (power failure, computer down, ...)
+					// TODO: password also exchanged by sockets to check identity
+					//socket = io.connect("/" + assessment.name, {
+					//	query: "number=" + this.student.number + "&password=" + this.password
+					//});
+					//socket.on(message.allAnswers, this.setAnswers);
+					initializeStage2(s.questions);
+				},
+			});
+		},
+		// stage 2
+		runTimer: function() {
+			if (assessment.time <= 0)
+				return;
+			let self = this;
+			setInterval( function() {
+				self.remainingTime--;
+				if (self.remainingTime <= 0 || self.stage >= 4)
+					self.endAssessment();
+					clearInterval(this);
+			}, 1000);
+		},
+		// stage 2 after disconnect (socket)
+		resumeAssessment: function() {
+			// UNIMPLEMENTED
+			// TODO: get stored answers (papers[number cookie]), inject (inputs), set index+indices
+		},
+		// stage 2 --> 3 (or 4)
+		// from a message by statements component
+		endAssessment: function() {
+			// If time over or cheating: set endTime, destroy password
+			$("#leftButton, #rightButton").show();
+			//this.sendAnswer(...); //TODO: for each non-answered (and non-empty!) index (yet)
+			if (assessment.mode != "open")
+			{
+				$.ajax("/end/assessment", {
+					method: "GET",
+					data: {
+						aid: assessment._id,
+						number: this.student.number,
+						password: this.student.password,
+					},
+					dataType: "json",
+					success: ret => {
+						if (!!ret.errmsg)
+							return alert(ret.errmsg);
+						assessment.conclusion = ret.conclusion;
+						this.stage = 3;
+						delete this.student["password"]; //unable to send new answers now
+						//socket.disconnect();
+						//socket = null;
+					},
+				});
+			}
+			else
+				this.stage = 4;
+		},
+		// stage 3 --> 4 (on socket message "feedback")
+		setAnswers: function(answers) {
+			for (let i=0; i<answers.length; i++)
+				assessment.questions[i].answer = answers[i];
+			this.stage = 4;
+		},
+	},
+});
diff --git a/public/javascripts/course.js b/public/javascripts/course.js
new file mode 100644
index 0000000..94e1b84
--- /dev/null
+++ b/public/javascripts/course.js
@@ -0,0 +1,360 @@
+// TODO: YAML format for questions, parsed from text (nested questions)
+// Then yaml parsed to json --> array of indexed questions
+// Use open mode for question banks: add setting "nbQuestions" to show nbQuestions
+// at random among active questions
+
+window.onload = function() {
+
+	V = new Vue({
+		el: '#course',
+		data: {
+			display: "assessments", //or "students", or "grades" (admin mode)
+			course: course,
+			mode: "view", //or "edit" (some assessment)
+			// assessment data:
+			monitorPwd: "",
+			newAssessment: { name: "" },
+			assessmentArray: assessmentArray,
+			assessmentIndex: 0, //current edited assessment index
+			assessment: { }, //copy of assessment at editing index in array
+			assessmentText: "", //questions in an assessment, in text format
+			// grades data:
+			settings: {
+				totalPoints: 20,
+				halfPoints: false,
+				zeroSum: false,
+			},
+			group: 1, //for detailed grades tables
+			grades: { }, //computed
+		},
+		mounted: function() {
+			$('.modal').each( (i,elem) => {
+				if (elem.id != "assessmentEdit")
+					$(elem).modal();
+			});
+			$('ul.tabs').tabs();
+			$('#assessmentEdit').modal({
+				complete: () => {
+					this.parseAssessment();
+					Vue.nextTick( () => {
+						$("#questionList").find("code[class^=language-]").each( (i,elem) => {
+							Prism.highlightElement(elem);
+						});
+						MathJax.Hub.Queue(["Typeset",MathJax.Hub,"questionList"]);
+					});
+				},
+			});
+		},
+		methods: {
+			// GENERAL:
+			toggleDisplay: function(area) {
+				if (this.display == area)
+					this.display = "";
+				else
+					this.display = area;
+			},
+			studentList: function(group) {
+				return this.course.students
+					.filter( s => { return group==0 || s.group == group; })
+					.map( s => { return Object.assign({}, s); }) //not altering initial array
+					.sort( (a,b) => {
+						let res = a.name.localeCompare(b.name);
+						if (res == 0)
+							res += a.forename.localeCompare(b.forename);
+						return res;
+					});
+			},
+			// STUDENTS:
+			uploadTrigger: function() {
+				$("#upload").click();
+			},
+			upload: function(e) {
+				let file = (e.target.files || e.dataTransfer.files)[0];
+				Papa.parse(file, {
+					header: true,
+					skipEmptyLines: true,
+					complete: (results,file) => {
+						let students = [ ];
+						// Post-process: add group/number if missing
+						let number = 1;
+						results.data.forEach( d => {
+							if (!d.group)
+								d.group = 1;
+							if (!d.number)
+								d.number = number++;
+							if (typeof d.number !== "string")
+								d.number = d.number.toString();
+							students.push(d);
+						});
+						$.ajax("/import/students", {
+							method: "POST",
+							data: {
+								cid: this.course._id,
+								students: JSON.stringify(students),
+							},
+							dataType: "json",
+							success: res => {
+								if (!res.errmsg)
+									this.course.students = students;
+								else
+									alert(res.errmsg);
+							},
+						});
+					},
+				});
+			},
+			// ASSESSMENT:
+			addAssessment: function() {
+				if (!admin)
+					return;
+				// modal, fill code and description
+				let error = Validator.checkObject(this.newAssessment, "Assessment");
+				if (!!error)
+					return alert(error);
+				else
+					$('#newAssessment').modal('close');
+				$.ajax("/add/assessment",
+					{
+						method: "GET",
+						data: {
+							name: this.newAssessment.name,
+							cid: course._id,
+						},
+						dataType: "json",
+						success: res => {
+							if (!res.errmsg)
+							{
+								this.newAssessment["name"] = "";
+								this.assessmentArray.push(res);
+							}
+							else
+								alert(res.errmsg);
+						},
+					}
+				);
+			},
+			materialOpenModal: function(id) {
+				$("#" + id).modal("open");
+				Materialize.updateTextFields(); //textareas, time field...
+			},
+			updateAssessment: function() {
+				$.ajax("/update/assessment", {
+					method: "POST",
+					data: {assessment: JSON.stringify(this.assessment)},
+					dataType: "json",
+					success: res => {
+						if (!res.errmsg)
+						{
+							this.assessmentArray[this.assessmentIndex] = this.assessment;
+							this.mode = "view";
+						}
+						else
+							alert(res.errmsg);
+					},
+				});
+			},
+			deleteAssessment: function(assessment) {
+				if (!admin)
+					return;
+				if (confirm("Delete assessment '" + assessment.name + "' ?"))
+				{
+					$.ajax("/remove/assessment",
+						{
+							method: "GET",
+							data: { qid: this.assessment._id },
+							dataType: "json",
+							success: res => {
+								if (!res.errmsg)
+									this.assessmentArray.splice( this.assessmentArray.findIndex( item => {
+										return item._id == assessment._id;
+									}), 1 );
+								else
+									alert(res.errmsg);
+							},
+						}
+					);
+				}
+			},
+			toggleState: function(questionIndex) {
+				// add or remove from activeSet of current assessment
+				let activeIndex = this.assessment.activeSet.findIndex( item => { return item == questionIndex; });
+				if (activeIndex >= 0)
+					this.assessment.activeSet.splice(activeIndex, 1);
+				else
+					this.assessment.activeSet.push(questionIndex);
+			},
+			setAssessmentText: function() {
+				let txt = "";
+				this.assessment.questions.forEach( q => {
+					txt += q.wording + "\n";
+					q.options.forEach( (o,i) => {
+						let symbol = q.answer.includes(i) ? "+" : "-";
+						txt += symbol + " " + o + "\n";
+					});
+					txt += "\n"; //separate questions by new line
+				});
+				this.assessmentText = txt;
+			},
+			parseAssessment: function() {
+				let questions = [ ];
+				let lines = this.assessmentText.split("\n").map( L => { return L.trim(); })
+				lines.push(""); //easier parsing
+				let emptyQuestion = () => {
+					return {
+						wording: "",
+						options: [ ],
+						answer: [ ],
+						active: true, //default
+					};
+				};
+				let q = emptyQuestion();
+				lines.forEach( L => {
+					if (L.length > 0)
+					{
+						if (['+','-'].includes(L.charAt(0)))
+						{
+							if (L.charAt(0) == '+')
+								q.answer.push(q.options.length);
+							q.options.push(L.slice(1).trim());
+						}
+						else if (L.charAt(0) == '*')
+						{
+							// TODO: read current + next lines into q.answer (HTML, 1-elem array)
+						}
+						else
+							q.wording += L + " "; //space required at line breaks, generally
+					}
+					else
+					{
+						// Flush current question (if any)
+						if (q.wording.length > 0)
+						{
+							questions.push(q);
+							q = emptyQuestion();
+						}
+					}
+				});
+				this.assessment.questions = questions;
+			},
+			actionAssessment: function(index) {
+				if (admin)
+				{
+					// Edit screen
+					this.assessmentIndex = index;
+					this.assessment = $.extend(true, {}, this.assessmentArray[index]);
+					this.setAssessmentText();
+					this.mode = "edit";
+					Vue.nextTick( () => {
+						$("#questionList").find("code[class^=language-]").each( (i,elem) => {
+							Prism.highlightElement(elem);
+						});
+						MathJax.Hub.Queue(["Typeset",MathJax.Hub,"questionList"]);
+					});
+				}
+				else //external user: show assessment
+					this.redirect(this.assessmentArray[index].name);
+			},
+			redirect: function(assessmentName) {
+				document.location.href = "/" + initials + "/" + course.code + "/" + assessmentName;
+			},
+			setPassword: function() {
+				let hashPwd = Sha1.Compute(this.monitorPwd);
+				let error = Validator.checkObject({password:hashPwd}, "Course");
+				if (error.length > 0)
+					return alert(error);
+				$.ajax("/set/password",
+					{
+						method: "GET",
+						data: {
+							cid: this.course._id,
+							pwd: hashPwd,
+						},
+						dataType: "json",
+						success: res => {
+							if (!res.errmsg)
+								alert("Password saved!");
+							else
+								alert(res.errmsg);
+						},
+					}
+				);
+			},
+			// NOTE: artifact required for Vue v-model to behave well
+			checkBoxFixedId: function(i) {
+				return "questionFixed" + i;
+			},
+			checkBoxActiveId: function(i) {
+				return "questionActive" + i;
+			},
+			// GRADES:
+			gradeSettings: function() {
+				$("#gradeSettings").modal("open");
+				Materialize.updateTextFields(); //total points field in grade settings overlap
+			},
+			download: function() {
+				// Download (all) grades as a CSV file
+				let data = [ ];
+				this.studentList(0).forEach( s => {
+					let finalGrade = 0.;
+					let gradesCount = 0;
+					if (!!this.grades[s.number])
+					{
+						Object.keys(this.grades[s.number]).forEach( assessmentName => {
+							s[assessmentName] = this.grades[s.number][assessmentName];
+							if (_.isNumeric(s[assessmentName]) && !isNaN(s[assessmentName]))
+							{
+								finalGrade += s[assessmentName];
+								gradesCount++;
+							}
+							if (gradesCount >= 1)
+								finalGrade /= gradesCount;
+							s["final"] = finalGrade; //TODO: forbid "final" as assessment name
+						});
+					}
+					data.push(s); //number,forename,name,group,assessName1...assessNameN,final
+				});
+				let csv = Papa.unparse(data, {
+					quotes: true,
+					header: true,
+				});
+				let downloadAnchor = $("#download");
+				downloadAnchor.attr("download", this.course.code + "_results.csv");
+				downloadAnchor.attr("href", "data:text/plain;charset=utf-8," + encodeURIComponent(csv));
+				this.$refs.download.click()
+				//downloadAnchor.click(); //fails
+			},
+			showDetails: function(group) {
+				this.group = group;
+				$("#detailedGrades").modal("open");
+			},
+			groupList: function() {
+				let maxGrp = 1;
+				this.course.students.forEach( s => {
+					if (s.group > maxGrp)
+						maxGrp = s.group;
+				});
+				return _.range(1,maxGrp+1);
+			},
+			grade: function(assessmentIndex, studentNumber) {
+				if (!this.grades[assessmentIndex] || !this.grades[assessmentIndex][studentNumber])
+					return ""; //no grade yet
+				return this.grades[assessmentIndex][studentNumber];
+			},
+			groupId: function(group, hash) {
+				return (!!hash?"#":"") + "group" + group;
+			},
+			togglePresence: function(number, index) {
+				// UNIMPLEMENTED
+				// TODO: if no grade (thus automatic 0), toggle "exempt" state on student for current exam
+				// --> automatic update of grades view (just a few number to change)
+			},
+			computeGrades: function() {
+				// UNIMPLEMENTED
+				// TODO: compute all grades using settings (points, coefficients, bonus/malus...).
+				// If some questions with free answers (open), display answers and ask teacher action.
+				// TODO: need a setting for that too (by student, by exercice, by question)
+			},
+		},
+	});
+
+};
diff --git a/public/javascripts/courseList.js b/public/javascripts/courseList.js
new file mode 100644
index 0000000..ae1f1d8
--- /dev/null
+++ b/public/javascripts/courseList.js
@@ -0,0 +1,69 @@
+window.onload = function() {
+
+	new Vue({
+		el: '#courseList',
+		data: {
+			courseArray: courseArray,
+			newCourse: {
+				code: "",
+				description: "",
+			},
+		},
+		mounted: function() {
+			$('.modal').modal();
+		},
+		methods: {
+			redirect: function(code) {
+				document.location.href = "/" + initials + "/" + code;
+			},
+			addCourse: function() {
+				if (!admin)
+					return;
+				// modal, fill code and description
+				let error = Validator.checkCode(this.newCourse.code);
+				if (!!error)
+					return alert(error);
+				else
+					$('#newCourse').modal('close');
+				$.ajax("/add/course",
+					{
+						method: "GET",
+						data: this.newCourse,
+						dataType: "json",
+						success: res => {
+							if (!res.errmsg)
+							{
+								this.newCourse["code"] = "";
+								this.newCourse["description"] = "";
+								this.courseArray.push(res);
+							}
+							else
+								alert(res.errmsg);
+						},
+					}
+				);
+			},
+			deleteCourse: function(course) {
+				if (!admin)
+					return;
+				if (confirm("Delete course '" + course.code + "' ?"))
+					$.ajax("/remove/course",
+						{
+							method: "GET",
+							data: { cid: course._id },
+							dataType: "json",
+							success: res => {
+								if (!res.errmsg)
+									this.courseArray.splice( this.courseArray.findIndex( item => {
+										return item._id == course._id;
+									}), 1 );
+								else
+									alert(res.errmsg);
+							},
+						}
+					);
+				},
+			}
+	});
+
+};
diff --git a/public/javascripts/login.js b/public/javascripts/login.js
new file mode 100644
index 0000000..1bb5b72
--- /dev/null
+++ b/public/javascripts/login.js
@@ -0,0 +1,89 @@
+window.onload = function() {
+
+	const messages = {
+		"login": "Go",
+		"register": "Send",
+	};
+
+	const ajaxUrl = {
+		"login": "/sendtoken",
+		"register": "/register",
+	};
+
+	const infos = {
+		"login": "Connection token sent. Check your emails!",
+		"register": "Registration complete! Please check your emails.",
+	};
+
+	const animationDuration = 300; //in milliseconds
+
+	// Basic anti-bot measure: force at least N seconds between arrival on page, and register form validation:
+	const enterTime = Date.now();
+
+	new Vue({
+		el: '#login',
+		data: {
+			messages: messages,
+			user: {
+				forename: "",
+				name: "",
+				email: "",
+			},
+			stage: "login", //or "register"
+		},
+		mounted: function() {
+			// https://laracasts.com/discuss/channels/vue/vuejs-set-focus-on-textfield
+			this.$refs.userEmail.focus();
+		},
+		methods: {
+			toggleStage: function(stage) {
+				let $form = $("#form");
+				$form.fadeOut(animationDuration);
+				setTimeout( () => {
+					this.stage = stage;
+					$form.show(0);
+				}, animationDuration);
+			},
+			submit: function() {
+				if (this.stage=="register")
+				{
+					if (Date.now() - enterTime < 5000)
+						return;
+				}
+				let error = Validator.checkObject({email: this.user.email}, "User");
+				if (!error && this.stage == "register")
+					error = Validator.checkObject({forename: this.user.forename, name: this.user.name}, "User");
+				let $dialog = $("#dialog");
+				show($dialog);
+				setTimeout(() => {hide($dialog);}, 3000);
+				if (error.length > 0)
+					return showMsg($dialog, "error", error);
+				showMsg($dialog, "process", "Processing... Please wait");
+				$.ajax(ajaxUrl[this.stage],
+					{
+						method: "GET",
+						data:
+						{
+							email: encodeURIComponent(this.user.email),
+							forename: encodeURIComponent(this.user.forename), //may be unused
+							name: encodeURIComponent(this.user.name), //may be unused
+						},
+						dataType: "json",
+						success: res => {
+							if (!res.errmsg)
+							{
+								this.user["forename"] = "";
+								this.user["name"] = "";
+								this.user["email"] = "";
+								showMsg($dialog, "info", infos[this.stage]);
+							}
+							else
+								showMsg($dialog, "error", res.errmsg);
+						},
+					}
+				);
+			},
+		}
+	});
+
+};
diff --git a/public/javascripts/monitor.js b/public/javascripts/monitor.js
new file mode 100644
index 0000000..b58461b
--- /dev/null
+++ b/public/javascripts/monitor.js
@@ -0,0 +1,11 @@
+// UNIMPLEMENTED
+
+// TODO: onglets pour chaque groupe + section déroulante questionnaire (chargé avec réponses)
+//   NOM Prenom (par grp, puis alphabétique)
+//   réponse : vert si OK (+ choix), rouge si faux, gris si texte (clic pour voir)
+//   + temps total ?
+//   click sur en-tête de colonne : tri alphabétique, tri décroissant...
+// Affiché si (hash du) mdp du cours est correctement entré
+// Doit reprendre les données en base si refresh (sinon : sockets)
+
+// Also buttons "start exam", "end exam" for logged in teacher
diff --git a/public/javascripts/utils/dialog.js b/public/javascripts/utils/dialog.js
new file mode 100644
index 0000000..979e757
--- /dev/null
+++ b/public/javascripts/utils/dialog.js
@@ -0,0 +1,30 @@
+function state2col(state)
+{
+	switch (state)
+	{
+		case "process":
+			return "black";
+		case "error":
+			return "red";
+		case "info":
+			return "blue";
+		default: //idle
+			return "white"; //irrelevant, dialog is hidden
+	}
+}
+
+function show($dialog)
+{
+	$dialog.removeClass("hide");
+}
+
+function hide($dialog)
+{
+	$dialog.addClass("hide");
+}
+
+function showMsg($dialog, state, msg)
+{
+	$dialog.html(msg);
+	$dialog.css("color", state2col(state));
+}
diff --git a/public/javascripts/utils/sha1.js b/public/javascripts/utils/sha1.js
new file mode 100644
index 0000000..d12006d
--- /dev/null
+++ b/public/javascripts/utils/sha1.js
@@ -0,0 +1,124 @@
+var Sha1 = {};  // SHA-1 namespace
+
+// SHA-1 algorithm as described at http://en.wikipedia.org/wiki/SHA-1
+// The implementation follows http://fr.wikipedia.org/wiki/Sp%C3%A9cifications_SHA-1 (in french).
+// SHA-1 implementation of Chris Veness 2002-2010 [www.movable-type.co.uk] helped a lot for debugging,
+// and for hacks like toHexStr(). See his script at http://www.movable-type.co.uk/scripts/sha1.html
+Sha1.Compute = function(subject)
+{
+	var i, j, tmp, redIndex, a, b, c, d, e;
+
+	// 1) pretreatment
+
+	// note: no check on message length, since the 2^64 boundary is
+	// a lot longer than what would be allowed by HTML/PHP
+
+	// add trailing '1' bit (+ 0's padding) to string
+	subject += String.fromCharCode(0x80);
+
+	// add 8 for two last reserved words to store message length
+	// 8 = 2 x 4, one 32-bits word is 4 characters (bytes) length.
+	var L = subject.length + 8;
+
+	// initialize 512-bits blocks representing the message, each containing 16 32-bits words.
+	// NOTE: one char is 8 bits, so one block in the initial string is 64 chars.
+	var countBlocks = Math.ceil(L / 64);
+	var blocks = new Array(countBlocks);
+	for (i=0; i<countBlocks; i++)
+	{
+		var words = new Array(16);
+		for (j=0; j<16; j++)
+		{
+			tmp = subject.substr(64 * i + 4 * j, 4);
+			// note: running off the end of msg is ok because bitwise ops on NaN return 0
+			words[j] = (1 << 24) * tmp.charCodeAt(0) | (1 << 16) * tmp.charCodeAt(1) | (1 << 8) * tmp.charCodeAt(2) | tmp.charCodeAt(3);
+		}
+		blocks[i] = words;
+	}
+
+	// note: 'subject' in our context will never be of length >= 2^32.
+	// therefore we don't need to fill before-last block.
+	blocks[countBlocks-1][15] = (subject.length-1) * 8;
+
+	// initialize parts of the final hash
+	var h0 = 0x67452301;
+	var h1 = 0xefcdab89;
+	var h2 = 0x98badcfe;
+	var h3 = 0x10325476;
+	var h4 = 0xc3d2e1f0;
+
+	// initialize constants array
+	var k = [0x5a827999,0x6ed9eba1,0x8f1bbcdc,0xca62c1d6];
+
+	// 2) computations
+
+	for (i=0; i<blocks.length; i++)
+	{
+		// initialize w array
+		var w = new Array(80);
+		for (j=0; j<16; j++) w[j] = blocks[i][j];
+		for (j=16; j<80; j++)
+			w[j] = Sha1.LeftRotate(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);
+
+		// initialize a,b,c,d,e variables
+		a = h0;
+		b = h1;
+		c = h2;
+		d = h3;
+		e = h4;
+
+		// iterations over a,b,c,d,e
+		for (j=0; j<80; j++)
+		{
+			// note: '& 0xffffffff' == 'modulo 2^32'.
+			redIndex = Math.floor(j/20);
+			tmp = (Sha1.LeftRotate(a, 5) + Sha1.BitOp(b, c, d, redIndex) + e + k[redIndex] + w[j]) & 0xffffffff;
+			e = d;
+			d = c;
+			c = Sha1.LeftRotate(b, 30);
+			b = a;
+			a = tmp;
+		}
+
+		// update intermediate hash values
+		h0 = (h0+a) & 0xffffffff;
+		h1 = (h1+b) & 0xffffffff;
+		h2 = (h2+c) & 0xffffffff;
+		h3 = (h3+d) & 0xffffffff;
+		h4 = (h4+e) & 0xffffffff;
+	}
+
+	return Sha1.ToHexStr(h0)+Sha1.ToHexStr(h1)+Sha1.ToHexStr(h2)+Sha1.ToHexStr(h3)+Sha1.ToHexStr(h4);
+}
+
+// auxiliary functions.
+Sha1.BitOp = function(x, y, z, t)
+{
+	if (t == 0) return (x & y) ^ (~x & z);
+	if (t == 1) return x ^ y ^ z;
+	if (t == 2) return (x & y) ^ (x & z) ^ (y & z);
+	if (t == 3) return x ^ y ^ z;
+}
+
+// left rotation (within 32 bits).
+Sha1.LeftRotate = function(x, n)
+{
+	return (x << n) | (x >>> (32 - n));
+}
+
+// [copy-pasted from Chris Veness implementation]
+// Hexadecimal representation of a number
+// (note toString(16) is implementation-dependant, and
+// in IE returns signed numbers when used on full words)
+Sha1.ToHexStr = function(x)
+{
+	var s="";
+	for (var i=7; i>=0; i--)
+	{
+		var v = (x >>> (i*4)) & 0xf;
+		s += v.toString(16);
+	}
+	return s;
+}
+
+try { module.exports = Sha1; } catch (err) {}
diff --git a/public/javascripts/utils/socketMessages.js b/public/javascripts/utils/socketMessages.js
new file mode 100644
index 0000000..4ffd05b
--- /dev/null
+++ b/public/javascripts/utils/socketMessages.js
@@ -0,0 +1,10 @@
+// Socket message list, easier life in case of a message renaming
+
+let message = {
+	// send answer (student --> server --> monitor)
+	newAnswer: "new answer",
+	// receive all answers to an exam (server --> student)
+	allAnswers: "all answers",
+};
+
+try { module.exports = message; } catch (err) {} //for server
diff --git a/public/javascripts/utils/validation.js b/public/javascripts/utils/validation.js
new file mode 100644
index 0000000..560bd5c
--- /dev/null
+++ b/public/javascripts/utils/validation.js
@@ -0,0 +1,241 @@
+try { var _ = require("underscore"); } catch (err) {} //for server
+
+let Validator = { };
+
+// Cell in assessment.questions array
+Validator.Question = {
+	"index": "section", //"2.2.1", "3.2", "1" ...etc
+	"wording": "string",
+	"options": "stringArray", //only for quiz
+	"fixed": "boolean",
+	"answer": "string", //both this and next are mutually exclusive
+	"choice": "integerArray",
+	"active": "boolean",
+	"points": "number",
+};
+
+Validator.Input = {
+	"index": "section",
+	"input": "stringOrIntegerArray",
+};
+
+// One student response to an exam
+Validator.Paper = {
+	"number": "code",
+	// (array of) strings for open questions, arrays of integers for quizzes:
+	"inputs": Validator.Input,
+	"startTime": "positiveInteger",
+	"endTime": "positiveInteger",
+	"password": "password",
+};
+
+Validator.Assessment = {
+	"_id": "bson",
+	"cid": "bson",
+	"name": "code",
+	"mode": "alphanumeric", //"open" or "exam", but alphanumeric is good enough
+	"active": "boolean",
+	"fixed": "boolean",
+	"display": "alphanumeric", //"one" or "all"
+	"time": "integer",
+	"introduction": "string",
+	"conclusion": "string",
+	"coefficient": "number",
+	"questions": Validator.Question,
+	"papers": Validator.Paper,
+};
+
+Validator.User = {
+	"_id": "bson",
+	"email": "email",
+	"forename": "name",
+	"name": "name",
+	"initials": "unchecked", //not a user input
+	"loginToken": "unchecked",
+	"sessionTokens": "unchecked",
+	"token": "alphanumeric", //exception: for the purpose of user registration
+};
+
+Validator.Student = {
+	"number": "code",
+	"forename": "name",
+	"name": "name",
+	"group": "positiveInteger",
+};
+
+Validator.Course = {
+	"_id": "bson",
+	"uid": "bson",
+	"code": "code",
+	"description": "string",
+	"password": "hash",
+	"students": Validator.Student,
+};
+
+Object.assign(Validator,
+{
+	// Recurse into sub-documents
+	checkObject_aux: function(obj, model)
+	{
+		for (let key of Object.keys(obj))
+		{
+			if (!model[key])
+				return "Unknown field";
+			if (model[key] == "unchecked") //not a user input (ignored)
+				continue;
+			if (_.isObject(model[key]))
+			{
+				// TODO: next loop seems too heavy... (only a concern if big class import?)
+				for (let item of obj[key])
+				{
+					let error = Validator.checkObject_aux(item, model[key]);
+					if (error.length > 0)
+						return error;
+				}
+			}
+			else
+			{
+				let error = Validator[ "check_" + model[key] ](obj[key]);
+				if (error.length > 0)
+					return key + ": " + error;
+			}
+		}
+		return "";
+	},
+
+	// Always check top-level object
+	checkObject: function(obj, name)
+	{
+		return Validator.checkObject_aux(obj, Validator[name]);
+	},
+
+	"check_string": function(arg)
+	{
+		return ""; //strings are unchecked, but sanitized
+	},
+
+	"check_section": function(arg)
+	{
+		if (!_.isString(arg))
+			return "not a string";
+		if (!/^[0-9.]+$/.test(arg))
+			return "digits and dot only";
+		return "";
+	},
+
+	"check_stringArray": function(arg)
+	{
+		return !_.isArray(arg) ? "not an array" : "";
+	},
+
+	"check_alphanumeric": function(arg)
+	{
+		return arg.match(/^[\w]{1,32}$/) === null ? "[1,32] alphanumerics" : "";
+	},
+
+	"check_bson": function(arg)
+	{
+		return arg.match(/^[a-z0-9]{24}$/) === null ? "not a BSON id" : "";
+	},
+
+	"check_name": function(arg)
+	{
+		if (!_.isString(arg))
+			return "not a string";
+		if (!/^[a-zA-Z\u00C0-\u024F -]{1,32}$/.test(arg))
+			return "[1,32] letters + hyphen/space";
+		return "";
+	},
+
+	"check_email": function(arg)
+	{
+		if (!_.isString(arg))
+			return "not a string";
+		if (arg.length > 64)
+			return "string too long: max. 64 characters";
+		// Regexp used in "type='email'" inputs ( http://emailregex.com/ )
+		if (!/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/.test(arg))
+			return "X@Y, alphanumerics and . _ - +(X)";
+		return "";
+	},
+
+	"check_code": function(arg)
+	{
+		if (!_.isString(arg))
+			return "not a string";
+		if (!/^[\w.-]{1,16}$/.test(arg))
+			return "[1,16] alphanumerics and . _ -";
+		return "";
+	},
+
+	"check_number": function(arg)
+	{
+		if (!_.isNumber(arg))
+			arg = parseFloat(arg);
+		if (isNaN(arg))
+			return "not a number";
+		return "";
+	},
+
+	"check_integer": function(arg)
+	{
+		if (!_.isNumber(arg))
+			arg = parseInt(arg);
+		if (isNaN(arg) || arg % 1 != 0)
+			return "not an integer";
+		return "";
+	},
+
+	"check_positiveInteger": function(arg)
+	{
+		return Validator["check_integer"](arg) || (arg<0 ? "not positive" : "");
+	},
+
+	"check_boolean": function(arg)
+	{
+		if (!_.isBoolean(arg))
+			return "not a boolean";
+		return "";
+	},
+
+	"check_password": function(arg)
+	{
+		if (!_.isString(arg))
+			return "not a string";
+		if (!/^[\x21-\x7E]{1,16}$/.test(arg))
+			return "[1,16] ASCII characters with code in [33,126]";
+		return "";
+	},
+
+	// Sha-1 hash: length 40, hexadecimal
+	"check_hash": function(arg)
+	{
+		if (!_.isString(arg))
+			return "not a string";
+		if (!/^[a-f0-9]{40}$/.test(arg))
+			return "not a sha-1 hash";
+		return "";
+	},
+
+	"check_integerArray": function(arg)
+	{
+		if (!_.isArray(arg))
+			return "not an array";
+		for (let i=0; i<arg.length; i++)
+		{
+			let error = Validator["check_integer"](arg[i]);
+			if (error.length > 0)
+				return error;
+		}
+		return "";
+	},
+
+	"check_stringOrIntegerArray": function(arg)
+	{
+		if (!_.isString(arg))
+			return Validator["check_integerArray"](arg);
+		return "";
+	},
+});
+
+try { module.exports = Validator.checkObject; } catch (err) {} //for server
diff --git a/public/stylesheets/assessment.css b/public/stylesheets/assessment.css
new file mode 100644
index 0000000..3187907
--- /dev/null
+++ b/public/stylesheets/assessment.css
@@ -0,0 +1,55 @@
+a#rightButton {
+	position: absolute;
+	top: 0;
+	right: 0;
+}
+
+.question {
+	margin: 20px 5px;
+	padding: 15px 0;
+}
+
+.question button {
+	display: block;
+	margin: 0 auto 15px auto;
+}
+
+.question label {
+	color: black;
+}
+
+.question .choiceCorrect {
+	background-color: lightgreen;
+}
+
+.question .choiceWrong {
+	background-color: peachpuff;
+}
+
+.question .wording {
+	margin-bottom: 10px;
+}
+
+.question .option {
+	margin-left: 15px;
+}
+
+.question p {
+	margin-top: 10px;
+}
+
+.questionInactive {
+	background-color: lightgrey;
+}
+
+.introduction {
+	padding: 20px 5px;
+}
+
+.conclusion {
+	padding: 20px 5px;
+}
+
+.timer {
+	font-size: 2rem;
+}
diff --git a/public/stylesheets/course.css b/public/stylesheets/course.css
new file mode 100644
index 0000000..2d61347
--- /dev/null
+++ b/public/stylesheets/course.css
@@ -0,0 +1,56 @@
+h4.title {
+	cursor: pointer;
+	background-color: lightgrey;
+}
+
+tr.assessment {
+	cursor: pointer;
+}
+
+input#password {
+	width: auto;
+}
+
+table.result {
+	cursor: pointer;
+}
+
+tr.stats {
+	padding-top: 10px;
+}
+
+#questionList {
+	margin: 20px 5px;
+}
+
+.question {
+	margin: 20px 0;
+}
+
+.question .choiceCorrect {
+	background-color: lightgreen;
+}
+
+.question .wording {
+	margin-bottom: 10px;
+}
+
+.question .option {
+	margin-left: 15px;
+}
+
+.question p {
+	margin-top: 10px;
+}
+
+.questionInactive {
+	background-color: lightgrey;
+}
+
+.introduction {
+	margin-top: 20px;
+}
+
+.conclusion {
+	margin-bottom: 20px;
+}
diff --git a/public/stylesheets/courseList.css b/public/stylesheets/courseList.css
new file mode 100644
index 0000000..1846eb8
--- /dev/null
+++ b/public/stylesheets/courseList.css
@@ -0,0 +1,3 @@
+tr.course {
+	cursor: pointer;
+}
diff --git a/public/stylesheets/index.css b/public/stylesheets/index.css
new file mode 100644
index 0000000..30c9107
--- /dev/null
+++ b/public/stylesheets/index.css
@@ -0,0 +1,3 @@
+tr.teacher {
+	cursor: pointer;
+}
diff --git a/public/stylesheets/layout.css b/public/stylesheets/layout.css
new file mode 100644
index 0000000..d4dc11d
--- /dev/null
+++ b/public/stylesheets/layout.css
@@ -0,0 +1,3 @@
+.on-left {
+	margin-right: 20px;
+}
diff --git a/public/stylesheets/login.css b/public/stylesheets/login.css
new file mode 100644
index 0000000..f745f2e
--- /dev/null
+++ b/public/stylesheets/login.css
@@ -0,0 +1,22 @@
+#form {
+	margin-top: 30px;
+	padding: 10px 20px 20px 20px;
+}
+
+#submit {
+	margin: 10px 0 15px 0;
+}
+
+#toggle {
+	color: darkblue;
+	cursor: pointer;
+}
+
+#toggle span:not(:last-child) {
+	margin-right: 30px;
+}
+
+#dialog {
+	margin-top: 20px;
+	padding: 20px;
+}
diff --git a/public/stylesheets/monitor.css b/public/stylesheets/monitor.css
new file mode 100644
index 0000000..8f414f5
--- /dev/null
+++ b/public/stylesheets/monitor.css
@@ -0,0 +1 @@
+/* TODO */
diff --git a/public/vendor/prism/prism-components.zip b/public/vendor/prism/prism-components.zip
new file mode 100644
index 0000000..dbc818a
--- /dev/null
+++ b/public/vendor/prism/prism-components.zip
@@ -0,0 +1 @@
+#$# git-fat 0a0ef2276985c0f221752b8c330d9b04275cafc1               589999
diff --git a/public/vendor/prism/prism.css b/public/vendor/prism/prism.css
new file mode 100644
index 0000000..506acb3
--- /dev/null
+++ b/public/vendor/prism/prism.css
@@ -0,0 +1,140 @@
+/* PrismJS 1.10.0
+http://prismjs.com/download.html?themes=prism&languages=clike+python+sql&plugins=autoloader */
+/**
+ * prism.js default theme for JavaScript, CSS and HTML
+ * Based on dabblet (http://dabblet.com)
+ * @author Lea Verou
+ */
+
+code[class*="language-"],
+pre[class*="language-"] {
+	color: black;
+	background: none;
+	text-shadow: 0 1px white;
+	font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	word-wrap: normal;
+	line-height: 1.5;
+
+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
+code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
+code[class*="language-"]::selection, code[class*="language-"] ::selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+@media print {
+	code[class*="language-"],
+	pre[class*="language-"] {
+		text-shadow: none;
+	}
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	padding: 1em;
+	margin: .5em 0;
+	overflow: auto;
+}
+
+:not(pre) > code[class*="language-"],
+pre[class*="language-"] {
+	background: #f5f2f0;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	padding: .1em;
+	border-radius: .3em;
+	white-space: normal;
+}
+
+.token.comment,
+.token.prolog,
+.token.doctype,
+.token.cdata {
+	color: slategray;
+}
+
+.token.punctuation {
+	color: #999;
+}
+
+.namespace {
+	opacity: .7;
+}
+
+.token.property,
+.token.tag,
+.token.boolean,
+.token.number,
+.token.constant,
+.token.symbol,
+.token.deleted {
+	color: #905;
+}
+
+.token.selector,
+.token.attr-name,
+.token.string,
+.token.char,
+.token.builtin,
+.token.inserted {
+	color: #690;
+}
+
+.token.operator,
+.token.entity,
+.token.url,
+.language-css .token.string,
+.style .token.string {
+	color: #a67f59;
+	background: hsla(0, 0%, 100%, .5);
+}
+
+.token.atrule,
+.token.attr-value,
+.token.keyword {
+	color: #07a;
+}
+
+.token.function {
+	color: #DD4A68;
+}
+
+.token.regex,
+.token.important,
+.token.variable {
+	color: #e90;
+}
+
+.token.important,
+.token.bold {
+	font-weight: bold;
+}
+.token.italic {
+	font-style: italic;
+}
+
+.token.entity {
+	cursor: help;
+}
+
diff --git a/public/vendor/prism/prism.js b/public/vendor/prism/prism.js
new file mode 100644
index 0000000..4b29e81
--- /dev/null
+++ b/public/vendor/prism/prism.js
@@ -0,0 +1,7 @@
+/* PrismJS 1.10.0
+http://prismjs.com/download.html?themes=prism&languages=clike+python+sql&plugins=autoloader */
+var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(){var e=/\blang(?:uage)?-(\w+)\b/i,t=0,n=_self.Prism={manual:_self.Prism&&_self.Prism.manual,disableWorkerMessageHandler:_self.Prism&&_self.Prism.disableWorkerMessageHandler,util:{encode:function(e){return e instanceof r?new r(e.type,n.util.encode(e.content),e.alias):"Array"===n.util.type(e)?e.map(n.util.encode):e.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).match(/\[object (\w+)\]/)[1]},objId:function(e){return e.__id||Object.defineProperty(e,"__id",{value:++t}),e.__id},clone:function(e){var t=n.util.type(e);switch(t){case"Object":var r={};for(var a in e)e.hasOwnProperty(a)&&(r[a]=n.util.clone(e[a]));return r;case"Array":return e.map(function(e){return n.util.clone(e)})}return e}},languages:{extend:function(e,t){var r=n.util.clone(n.languages[e]);for(var a in t)r[a]=t[a];return r},insertBefore:function(e,t,r,a){a=a||n.languages;var l=a[e];if(2==arguments.length){r=arguments[1];for(var i in r)r.hasOwnProperty(i)&&(l[i]=r[i]);return l}var o={};for(var s in l)if(l.hasOwnProperty(s)){if(s==t)for(var i in r)r.hasOwnProperty(i)&&(o[i]=r[i]);o[s]=l[s]}return n.languages.DFS(n.languages,function(t,n){n===a[e]&&t!=e&&(this[t]=o)}),a[e]=o},DFS:function(e,t,r,a){a=a||{};for(var l in e)e.hasOwnProperty(l)&&(t.call(e,l,e[l],r||l),"Object"!==n.util.type(e[l])||a[n.util.objId(e[l])]?"Array"!==n.util.type(e[l])||a[n.util.objId(e[l])]||(a[n.util.objId(e[l])]=!0,n.languages.DFS(e[l],t,l,a)):(a[n.util.objId(e[l])]=!0,n.languages.DFS(e[l],t,null,a)))}},plugins:{},highlightAll:function(e,t){n.highlightAllUnder(document,e,t)},highlightAllUnder:function(e,t,r){var a={callback:r,selector:'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'};n.hooks.run("before-highlightall",a);for(var l,i=a.elements||e.querySelectorAll(a.selector),o=0;l=i[o++];)n.highlightElement(l,t===!0,a.callback)},highlightElement:function(t,r,a){for(var l,i,o=t;o&&!e.test(o.className);)o=o.parentNode;o&&(l=(o.className.match(e)||[,""])[1].toLowerCase(),i=n.languages[l]),t.className=t.className.replace(e,"").replace(/\s+/g," ")+" language-"+l,t.parentNode&&(o=t.parentNode,/pre/i.test(o.nodeName)&&(o.className=o.className.replace(e,"").replace(/\s+/g," ")+" language-"+l));var s=t.textContent,g={element:t,language:l,grammar:i,code:s};if(n.hooks.run("before-sanity-check",g),!g.code||!g.grammar)return g.code&&(n.hooks.run("before-highlight",g),g.element.textContent=g.code,n.hooks.run("after-highlight",g)),n.hooks.run("complete",g),void 0;if(n.hooks.run("before-highlight",g),r&&_self.Worker){var u=new 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diff --git a/routes/all.js b/routes/all.js
new file mode 100644
index 0000000..1c0d052
--- /dev/null
+++ b/routes/all.js
@@ -0,0 +1,11 @@
+var router = require("express").Router();
+
+// AJAX requests:
+router.use("/", require("./users"));
+router.use("/", require("./courses"));
+router.use("/", require("./assessments"));
+
+// Pages:
+router.use("/", require("./pages"));
+
+module.exports = router;
diff --git a/routes/assessments.js b/routes/assessments.js
new file mode 100644
index 0000000..559f08f
--- /dev/null
+++ b/routes/assessments.js
@@ -0,0 +1,96 @@
+let router = require("express").Router();
+const access = require("../utils/access");
+const UserModel = require("../models/user");
+const AssessmentModel = require("../models/assessment");
+const AssessmentEntity = require("../entities/assessment");
+const CourseModel = require("../models/course");
+const params = require("../config/parameters");
+const validator = require("../public/javascripts/utils/validation");
+const ObjectId = require("bson-objectid");
+const sanitizeHtml = require('sanitize-html');
+
+router.get("/add/assessment", access.ajax, access.logged, (req,res) => {
+	const name = req.query["name"];
+	const cid = req.query["cid"];
+	let error = validator({cid:cid, name:name}, "Assessment");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	AssessmentModel.add(req.user._id, ObjectId(cid), name, (err,assessment) => {
+		access.checkRequest(res, err, assessment, "Assessment addition failed", () => {
+			res.json(assessment);
+		});
+	});
+});
+
+router.post("/update/assessment", access.ajax, access.logged, (req,res) => {
+	const assessment = JSON.parse(req.body["assessment"]);
+	let error = validator(assessment, "Assessment");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	const sanitizeOpts = {allowedTags: sanitizeHtml.defaults.allowedTags.concat([ 'img' ]) };
+	assessment.introduction = sanitizeHtml(assessment.introduction, sanitizeOpts);
+	assessment.conclusion = sanitizeHtml(assessment.conclusion, sanitizeOpts);
+	assessment.questions.forEach( q => {
+		q.wording = sanitizeHtml(q.wording, sanitizeOpts);
+		//q.answer = sanitizeHtml(q.answer); //if text (TODO: it's an array in this case?!)
+		for (let i=0; i<q.options.length; i++) //if QCM
+			q.options[i] = sanitizeHtml(q.options[i], sanitizeOpts);
+	});
+	AssessmentModel.update(req.user._id, assessment, (err,ret) => {
+		access.checkRequest(res, err, ret, "Assessment update failed", () => {
+			res.json({});
+		});
+	});
+});
+
+// Generate and set student password, return it
+router.get("/start/assessment", access.ajax, (req,res) => {
+	let number = req.query["number"];
+	let aid = req.query["aid"];
+	let error = validator({ _id:aid, papers:[{number:number}] }, "Assessment");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	AssessmentModel.startSession(ObjectId(aid), number, (err,ret) => {
+		access.checkRequest(res,err,ret,"Failed session initialization", () => {
+			// Set password
+			res.cookie("password", ret.password, {
+				httpOnly: true,
+				maxAge: params.cookieExpire,
+			});
+			res.json(ret); //contains questions+password
+		});
+	});
+});
+
+router.get("/send/answer", access.ajax, (req,res) => {
+	let aid = req.query["aid"];
+	let number = req.query["number"];
+	let password = req.query["password"];
+	let input = JSON.parse(req.query["answer"]);
+	let error = validator({ _id:aid, papers:[{number:number,password:password,inputs:[input]}] }, "Assessment");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	AssessmentEntity.setInput(ObjectId(aid), number, password, input, (err,ret) => {
+		access.checkRequest(res,err,ret,"Cannot send answer", () => {
+			res.json({});
+		});
+	});
+});
+
+router.get("/end/assessment", access.ajax, (req,res) => {
+	let aid = req.query["aid"];
+	let number = req.query["number"];
+	let password = req.query["password"];
+	let error = validator({ _id:aid, papers:[{number:number,password:password}] }, "Assessment");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	// Destroy pwd, set endTime, return conclusion
+	AssessmentModel.endSession(ObjectId(aid), number, password, (err,conclusion) => {
+		access.checkRequest(res,err,conclusion,"Cannot end assessment", () => {
+			res.clearCookie('password');
+			res.json(conclusion);
+		});
+	});
+});
+
+module.exports = router;
diff --git a/routes/courses.js b/routes/courses.js
new file mode 100644
index 0000000..d221858
--- /dev/null
+++ b/routes/courses.js
@@ -0,0 +1,77 @@
+let router = require("express").Router();
+const access = require("../utils/access.js");
+const validator = require("../public/javascripts/utils/validation");
+const sanitizeHtml = require('sanitize-html');
+const ObjectId = require("bson-objectid");
+const CourseEntity = require("../entities/course");
+const CourseModel = require("../models/course");
+
+router.get('/add/course', access.ajax, access.logged, (req,res) => {
+	let code = req.query["code"];
+	let description = sanitizeHtml(req.query["description"]);
+	let error = validator({code:code}, "Course");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	CourseEntity.insert(req.user._id, code, description, (err,course) => {
+		access.checkRequest(res, err, course, "Course addition failed", () => {
+			res.json(course);
+		});
+	});
+});
+
+router.get("/set/password", access.ajax, access.logged, (req,res) => {
+	let cid = req.query["cid"];
+	let pwd = req.query["pwd"];
+	let error = validator({password:pwd, _id:cid}, "Course");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	CourseModel.setPassword(req.user._id, ObjectId(cid), pwd, (err,ret) => {
+		access.checkRequest(res, err, ret, "password update failed", () => {
+			res.json({});
+		});
+	});
+});
+
+router.post('/import/students', access.ajax, access.logged, (req,res) => {
+	let cid = req.body["cid"];
+	let students = JSON.parse(req.body["students"]);
+	let error = validator({_id:cid, students: students}, "Course");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	access.getUser(req, res, (err,user) => {
+		if (!!err)
+			return res.json(err);
+		CourseModel.importStudents(req.user._id, ObjectId(cid), students, (err,ret) => {
+			access.checkRequest(res, err, ret, "Students addition failed", () => {
+				res.json({});
+			});
+		});
+	});
+});
+
+router.get('/get/student', access.ajax, (req,res) => {
+	let number = req.query["number"];
+	let cid = req.query["cid"];
+	let error = validator({ _id: cid, students: [{number:number}] }, "Course");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	CourseEntity.getStudent(ObjectId(cid), number, (err,ret) => {
+		access.checkRequest(res, err, ret, "Failed retrieving student", () => {
+			res.json({student: ret.students[0]});
+		});
+	});
+});
+
+router.get('/remove/course', access.ajax, access.logged, (req,res) => {
+	let cid = req.query["cid"];
+	let error = validator({_id:cid}, "Course");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	CourseModel.remove(req.user._id, ObjectId(cid), (err,ret) => {
+		access.checkRequest(res, err, ret, "Course removal failed", () => {
+			res.json({});
+		});
+	});
+});
+
+module.exports = router;
diff --git a/routes/pages.js b/routes/pages.js
new file mode 100644
index 0000000..37b84cf
--- /dev/null
+++ b/routes/pages.js
@@ -0,0 +1,136 @@
+let router = require("express").Router();
+const access = require("../utils/access");
+const UserEntity = require("../entities/user");
+const AssessmentEntity = require("../entities/assessment");
+const CourseModel = require("../models/course");
+const AssessmentModel = require("../models/assessment");
+
+// Actual pages (least specific last)
+
+// List initials and count assessments
+router.get("/", (req,res) => {
+	UserEntity.getAll( (err,userArray) => {
+		if (!!err)
+			return res.json(err);
+		res.render("index", {
+			title: "home",
+			userArray: userArray,
+		});
+	});
+});
+
+// Login screen
+router.get("/login", access.unlogged, (req,res) => {
+	res.render("login", {
+		title: "login",
+	});
+});
+
+// Redirection screens when possible cheating attempt detected in exam
+router.get("/enablejs", (req,res) => {
+	res.render("enable-js", {
+		title: "JS disabled",
+	});
+});
+
+router.get("/nodevtools", (req,res) => {
+	res.render("no-devtools", {
+		title: "Devtools enabled",
+	});
+});
+
+// List courses of some user (should be [a-z]+[0-9]* but fails...)
+router.get("/:initials([a-z0-9]+)", (req,res) => {
+	let initials = req.params["initials"];
+	CourseModel.getByInitials(initials, (err,courseArray) => {
+		if (!!err)
+			return res.json(err);
+		access.getUser(req, res, (err2,user) => {
+			const isTeacher = !!user && user.initials == initials;
+			// Strip students from courses if not course admin (TODO: not required in any case)
+			if (!isTeacher)
+			{
+				courseArray.forEach( c => {
+					delete c["students"];
+				});
+			}
+			res.render("course-list", {
+				title: initials + " courses",
+				courseArray: courseArray,
+				teacher: isTeacher,
+				initials: initials,
+			});
+		});
+	});
+});
+
+// Detailed content of one course
+router.get("/:initials([a-z0-9]+)/:courseCode([a-z0-9._-]+)", (req,res) => {
+	let initials = req.params["initials"];
+	let code = req.params["courseCode"];
+	CourseModel.getByRefs(initials, code, (err,course) => {
+		access.checkRequest(res, err, course, "Course not found", () => {
+			AssessmentEntity.getByCourse(course._id, (err2,assessmentArray) => {
+				if (!!err)
+					return res.json(err);
+				access.getUser(req, res, (err2,user) => {
+					const isTeacher = !!user && user.initials == initials;
+					// Strip students from course if not course admin
+					if (!isTeacher)
+						delete course["students"];
+					res.render("course", {
+						title: "course " + initials + "/" + code,
+						course: course,
+						assessmentArray: assessmentArray,
+						teacher: isTeacher,
+						initials: initials,
+					});
+				});
+			});
+		});
+	});
+});
+
+// Display assessment (exam or open status)
+router.get("/:initials([a-z0-9]+)/:courseCode([a-z0-9._-]+)/:assessmentName([a-z0-9._-]+)", (req,res) => {
+	let initials = req.params["initials"];
+	let code = req.params["courseCode"];
+	let name = req.params["assessmentName"];
+	AssessmentModel.getByRefs(initials, code, name, (err,assessment) => {
+		access.checkRequest(res, err, assessment, "Assessment not found", () => {
+			if (!assessment.active)
+				return res.json({errmsg: "Assessment is idle"});
+			delete assessment["papers"]; //always remove recorded students answers
+			if (assessment.mode == "exam")
+			{
+				if (!!req.headers['user-agent'].match(/(SpecialAgent|HeadlessChrome|PhantomJS)/))
+				{
+					// Basic headless browser detection
+					return res.json({errmsg: "Headless browser detected"});
+				}
+				// Strip conclusion + questions if exam mode (stepwise process)
+				delete assessment["conclusion"];
+				delete assessment["questions"];
+			}
+			res.render("assessment", {
+				title: "assessment " + initials + "/" + code + "/" + name,
+				assessment: assessment,
+			});
+		});
+	});
+});
+
+// Monitor: --> after identification (password), always send password hash with requests
+router.get("/:initials([a-z0-9]+)/:courseCode([a-z0-9._-]+)/:assessmentName([a-z0-9._-]+)/monitor", (req,res) => {
+	let initials = req.params["initials"];
+	let code = req.params["courseCode"];
+	let name = req.params["assessmentName"];
+	res.render("monitor", {
+		title: "monitor assessment " + code + "/" + name,
+		initials: initials,
+		code: code,
+		name: name,
+	});
+});
+
+module.exports = router;
diff --git a/routes/users.js b/routes/users.js
new file mode 100644
index 0000000..c42b447
--- /dev/null
+++ b/routes/users.js
@@ -0,0 +1,117 @@
+let router = require("express").Router();
+const validator = require('../public/javascripts/utils/validation');
+const UserModel = require('../models/user');
+const UserEntity = require('../entities/user');
+const maild = require('../utils/mailer');
+const TokenGen = require("../utils/tokenGenerator");
+const access = require("../utils/access");
+const params = require("../config/parameters");
+
+// to: object user
+function sendLoginToken(subject, to, res)
+{
+	// Set login token and send welcome(back) email with auth link
+	let token = TokenGen.generate(params.token.length);
+	UserEntity.setLoginToken(token, to._id, to.ip, (err,ret) => {
+		access.checkRequest(res, err, ret, "Cannot set login token", () => {
+			maild.send({
+				from: params.mail.from,
+				to: to.email,
+				subject: subject,
+				body: "Hello " + to.initials + "!\n" +
+					"Access your account here: " +
+					params.siteURL + "/authenticate?token=" + token + "\\n" +
+					"Token will expire in " + params.token.expire/(1000*60) + " minutes."
+			}, err => {
+				res.json(err || {});
+			});
+		});
+	});
+}
+
+router.get('/register', access.ajax, access.unlogged, (req,res) => {
+	let email = decodeURIComponent(req.query.email);
+	let forename = decodeURIComponent(req.query.forename);
+	let name = decodeURIComponent(req.query.name);
+	const newUser = {
+		email: email,
+		name: name,
+		forename: forename,
+	};
+	let error = validator(newUser, "User");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	if (!UserModel.whitelistCheck(newUser.email))
+		return res.json({errmsg: "Email not in whitelist"});
+	UserEntity.getByEmail(newUser.email, (err,user0) => {
+		access.checkRequest(res, err, !user0?["ok"]:{}, "An account exists with this email", () => {
+			UserModel.create(newUser, (err,user) => {
+				access.checkRequest(res, err, user, "Registration failed", () => {
+					user.ip = req.ip;
+					sendLoginToken("Welcome to " + params.siteURL, user, res);
+				});
+			});
+		});
+	});
+});
+
+// Login:
+router.get('/sendtoken', access.ajax, access.unlogged, (req,res) => {
+	let email = decodeURIComponent(req.query.email);
+	let error = validator({email:email}, "User");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	UserEntity.getByEmail(email, (err,user) => {
+		access.checkRequest(res, err, user, "Unknown user", () => {
+			user.ip = req.ip;
+			sendLoginToken("Token for " + params.siteURL, user, res);
+		});
+	});
+});
+
+// Authentication process, optionally with email changing:
+router.get('/authenticate', access.unlogged, (req,res) => {
+	let loginToken = req.query.token;
+	let error = validator({token:loginToken}, "User");
+	if (error.length > 0)
+		return res.json({errmsg:error});
+	UserEntity.getByLoginToken(loginToken, (err,user) => {
+		access.checkRequest(res, err, user, "Invalid token", () => {
+			if (user.loginToken.ip != req.ip)
+				return res.json({errmsg: "IP address mismatch"});
+			let now = new Date();
+			let tsNow = now.getTime();
+			// If token older than params.tokenExpire, do nothing
+			if (user.loginToken.timestamp + params.token.expire < tsNow)
+				return res.json({errmsg: "Token expired"});
+			// Generate and update session token + destroy login token
+			let token = TokenGen.generate(params.token.length);
+			UserEntity.setSessionToken(token, user._id, (err,ret) => {
+				access.checkRequest(res, err, ret, "Authentication failed", () => {
+					// Set cookies and redirect to user main control panel
+					res.cookie("token", token, {
+						httpOnly: true,
+						maxAge: params.cookieExpire,
+					});
+					res.cookie("initials", user.initials, {
+						httpOnly: true,
+						maxAge: params.cookieExpire,
+					});
+					res.redirect("/" + user.initials);
+				});
+			});
+		});
+	});
+});
+
+router.get('/logout', access.logged, (req,res) => {
+	UserModel.logout(req.user._id, req.cookies.token, (err,ret) => {
+		access.checkRequest(res, err, ret, "Logout failed", () => {
+			res.clearCookie("initials");
+			res.clearCookie("token");
+			res.redirect('/');
+		});
+	});
+});
+
+module.exports = router;
diff --git a/setup/README b/setup/README
new file mode 100644
index 0000000..473b00e
--- /dev/null
+++ b/setup/README
@@ -0,0 +1,24 @@
+## Prerequisites
+
+node (v.6.10+), npm, mongo (v3.4+)
+
+msmtp: for sending e-mails
+
+git-fat: for large binary objects
+
+## Local installation
+
+First of all:
+    npm i
+
+Copy the files config/\*.js.dist without .dist extension.
+Adjust their content to your liking (especially DB name and user & mail settings).
+
+Then start mongodb service, create a database and user corresponding to the parameters,
+and run the mongo script database.js in setup/ folder:
+    load("setup/database.js") [from mongo shell]
+
+All should be good now:
+    npm start
+
+Note the "student.csv.sample" file in this folder, to test features locally.
diff --git a/setup/database.js b/setup/database.js
new file mode 100644
index 0000000..b9a392d
--- /dev/null
+++ b/setup/database.js
@@ -0,0 +1,13 @@
+// TODO: createCollections users, courses, assessments
+// with:
+// users
+//   unique initials, email
+//   index initials, email
+// courses
+//   unique (code,uid)
+//   index (code,uid)
+// assessments
+//   unique (cid, name)
+//   index (cid, name)
+// db.assessments.createIndex( { cid: 1, name: 1 } );
+// https://docs.mongodb.com/manual/core/index-compound/
diff --git a/setup/students.sample.csv b/setup/students.sample.csv
new file mode 100644
index 0000000..91d1105
--- /dev/null
+++ b/setup/students.sample.csv
@@ -0,0 +1,28 @@
+forename,name
+William,Plaisance
+Rosamonde,Dupuy
+Fabienne,Aubin
+Grégoire,Léveillé
+Fantina,Quinn
+Amitee,Morneau
+William,Lespérance
+Dreux,Vadeboncoeur
+Brigliador,Cadieux
+Grosvenor,Provencher
+Landers,Devost
+Joy,Laprise
+Dielle,Séguin
+Sidney,DeGrasse
+Jules,Gaillou
+Archaimbau,Bizier
+Dexter,Aucoin
+Searlas,Rivière
+Germain,Charpie
+Honore,Charlesbois
+Georges,LaCaille
+Anne,Ruest
+Searlas,Rochefort
+Ferrau,Adler
+Aimée,Asselin
+Delit,Cyr
+Noël,Babin
diff --git a/sockets.js b/sockets.js
new file mode 100644
index 0000000..38a9929
--- /dev/null
+++ b/sockets.js
@@ -0,0 +1,87 @@
+var message = require("./public/javascripts/utils/socketMessages.js");
+const params = require("./config/parameters");
+
+// TODO: when teacher connect on monitor, io.of("appropriate namespace").on(connect student) { ... }
+// --> 2 sockets on monitoring page: one with ns "/" et one dedicated to the exam, triggered after the first
+// --> The monitoring page should not be closed during exam (otherwise monitors won't receive any more data)
+
+function quizzRoom(socket) {
+	let students = { };
+
+	// Student or monitor stuff
+	const isTeacher = !!socket.handshake.query.secret && socket.handshake.query.secret == params.secret;
+
+	if (isTeacher)
+	{
+		// TODO: on student disconnect, too
+		socket.on(message.newAnswer, m => { //got answer from student
+			socket.emit(message.newAnswer, m);
+		});
+		socket.on(message.socketFeedback, m => { //send feedback to student (answers)
+			if (!!students[m.number])
+				socket.broadcast.to(students[m.number]).emit(message.newFeedback, { feedback:m.feedback });
+		});
+		socket.on("disconnect", m => {
+			// Reset student array if no more active teacher connections (TODO: condition)
+			students = { };
+		});
+	}
+
+	else //student
+	{
+		const number = socket.handshake.query.number;
+		const password = socket.handshake.query.password;
+		// Prevent socket connection (just ignore) if student already connected
+		if (!!students[number] && students[number].password != password)
+			return;
+		students[number] = {
+			sid: socket.id,
+			password: password,
+		};
+		socket.on(message.newFeedback, () => { //got feedback from teacher
+			socket.emit(message.newFeedback, m);
+		});
+		// NOTE: nothing on disconnect --> teacher disconnect trigger students cleaning
+	}
+}
+
+module.exports = function(io) {
+
+	// NOTE: if prof connected with 2 tabs and close 1, quizz should not break, thus following counter
+	let namespaces = { };
+
+	io.of("/").on("connection", socketProf => {
+		function closeQuizz(fullPath) {
+			namespaces[fullPath].counter--;
+			if (namespaces[fullPath].counter == 0)
+			{
+				// https://stackoverflow.com/questions/26400595/socket-io-how-do-i-remove-a-namespace
+				const connectedSockets = Object.keys(namespaces[fullPath].nsp.connected);
+				connectedSockets.forEach( sid => {
+					namespaces[fullPath].nsp.connected[sid].disconnect();
+				});
+				namespaces[fullPath].nsp.removeAllListeners();
+				delete io.nsps[fullPath];
+			}
+		}
+		// Only prof account can connect default namespace
+		socketProf.on(message.startQuizz, m => {
+			// m contient quizz ID + fullPath (initials+path+name)
+			const quizzNamespace = io.of(m.fullPath);
+			if (!namespaces[m.fullPath])
+			{
+				namespaces[m.fullPath] = { nsp:quizzNamespace, counter:1 };
+				quizzNamespace.on("connection", quizzRoom); //après ça : prof can connect in quizz too
+				socketProf.emit(message.quizzReady);
+				socketProf.on(message.endQuizz, m2 => {
+					closeQuizz(m.fullPath);
+				});
+				socketProf.on("disconnect", m2 => {
+					closeQuizz(m.fullPath); //TODO: this should delete all students in array
+				});
+			}
+			else
+				namespaces[m.fullPath]++;
+		});
+	});
+}
diff --git a/utils/access.js b/utils/access.js
new file mode 100644
index 0000000..1f91724
--- /dev/null
+++ b/utils/access.js
@@ -0,0 +1,55 @@
+const _ = require("underscore");
+const UserEntity = require("../entities/user");
+
+let Access =
+{
+	getUser: function(req, res, callback)
+	{
+		if (!res.locals.loggedIn)
+			return callback({errmsg: "Not logged in!"}, undefined);
+		UserEntity.getBySessionToken(req.cookies.token, function(err, user) {
+			if (!user)
+				return callback({errmsg: "Not logged in!"}, undefined);
+			return callback(null, user);
+		});
+	},
+
+	// Before loading sensible content, check + save credentials
+	logged: function(req, res, next)
+	{
+		Access.getUser(req, res, (err,user) => {
+			if (!!err)
+				return res.json(err);
+			req.user = user;
+			next();
+		});
+	},
+
+	// Prevent access to "anonymous pages"
+	unlogged: function(req, res, next)
+	{
+		if (!!req.user)
+			return res.json({errmsg: "Already logged in!"});
+		next();
+	},
+
+	// Prevent direct access to AJAX results
+	ajax: function(req, res, next)
+	{
+		if (!req.xhr)
+			return res.json({errmsg: "Unauthorized access"});
+		next();
+	},
+
+	// Check for errors before callback (continue page loading). TODO: better name.
+	checkRequest: function(res, err, out, msg, cb)
+	{
+		if (!!err)
+			return res.json(err);
+		if (!out || _.isEmpty(out))
+			return res.json({errmsg: msg});
+		cb();
+	},
+};
+
+module.exports = Access;
diff --git a/utils/database.js b/utils/database.js
new file mode 100644
index 0000000..542588d
--- /dev/null
+++ b/utils/database.js
@@ -0,0 +1,9 @@
+const mongojs = require("mongojs");
+const params = require("../config/parameters");
+
+const connectionString =
+	params.db.user + ":" + params.db.password + "@" + params.db.host + ":" + params.db.port + "/" + params.db.name
+
+const db = mongojs(connectionString);
+
+module.exports = db;
diff --git a/utils/mailer.js b/utils/mailer.js
new file mode 100644
index 0000000..bcd3dc5
--- /dev/null
+++ b/utils/mailer.js
@@ -0,0 +1,42 @@
+const params = require("../config/parameters");
+const { exec } = require('child_process');
+
+let Mailer =
+{
+	// o: {from(*), to(*), subject, body} - (*): mandatory
+	send: function(o, callback)
+	{
+		let from = o.from;
+		let to = o.to;
+		let subject = !!o.subject ? o.subject : "[No subject]";
+		let body = !!o.body ? o.body : "";
+
+		// In development mode, just log message:
+		let env = process.env.NODE_ENV || 'development';
+		if ('development' === env)
+		{
+			console.log("New mail: from " + from + " / to " + to);
+			console.log("Subject: " + subject);
+			let msgText = body.split('\\n');
+			msgText.forEach(msg => { console.log(msg); });
+			callback({});
+		}
+		else
+		{
+			exec(
+				"printf 'From: " + from + "\n" +
+					"To: " + to + "\n" +
+					"Subject: " + subject + "\n" +
+					body + "' | msmtp -a " + params.mail.account + " " + to,
+				(err, stdout, stderr) => {
+					callback(err);
+					// the *entire* stdout and stderr (buffered)
+					//console.log("stdout: " + stdout);
+					//console.log("stderr: " + stderr);
+				}
+			);
+		}
+	}
+};
+
+module.exports = Mailer;
diff --git a/utils/tokenGenerator.js b/utils/tokenGenerator.js
new file mode 100644
index 0000000..054398e
--- /dev/null
+++ b/utils/tokenGenerator.js
@@ -0,0 +1,18 @@
+let TokenGen =
+{
+	rand: function()
+	{
+		return Math.random().toString(36).substr(2); // remove `0.`
+	},
+
+	generate: function(tlen)
+	{
+		var res = "";
+		var nbRands = Math.ceil(tlen/10); //10 = min length of a rand() string
+		for (var i = 0; i < nbRands; i++)
+			res += TokenGen.rand();
+		return res.substr(0, tlen);
+	},
+};
+
+module.exports = TokenGen;
diff --git a/views/assessment.pug b/views/assessment.pug
new file mode 100644
index 0000000..9caa03d
--- /dev/null
+++ b/views/assessment.pug
@@ -0,0 +1,66 @@
+extends withQuestions
+
+block append stylesheets
+	link(rel="stylesheet" href="/stylesheets/assessment.css")
+	noscript
+		meta(http-equiv="Refresh" content="0; URL=/enablejs")
+
+block rightMenu
+	a#rightButton.btn-floating.btn-large.grey(href=assessment.name + "/monitor")
+		i.material-icons video_label
+
+block content
+	.container#assessment
+		.row
+			#warning.modal
+				.modal-content
+					p Your answer to the current question was sent to the server.
+					p To avoid future unpleasant surprises, please don't
+					ul
+						li resize the window, or
+						li lose window focus.
+				.modal-footer
+					.center-align
+						a.modal-action.modal-close.waves-effect.waves-light.btn-flat(href="#!") Got it!
+		.row
+			.col.s12.m10.offset-m1.l8.offset-l2.xl6.offset-xl3
+				h4= assessment.name
+				#stage0(v-if="stage==0")
+					.card
+						.input-field.inline.on-left
+							label(for="number") Number
+							input#number(type="text" v-model="student.number" @keyup.enter="getStudent()")
+						button.waves-effect.waves-light.btn(@click="getStudent()") Send
+				#stage1(v-if="stage==1")
+					.card
+						if assessment.mode != "open"
+							.input-field.inline.on-left
+								label(for="forename") Forename
+								input#forename(type="text" v-model="student.forename" disabled)
+							.input-field.inline
+								label(for="name") Name
+								input#name(type="text" v-model="student.name" disabled)
+						p
+							if assessment.mode != "open"
+								button.waves-effect.waves-light.btn.on-left(@click="cancelStudent") Cancel
+							button.waves-effect.waves-light.btn(@click="startAssessment") Start!
+				#stage1_2_4(v-if="stage==1 || stage==2 || stage == 4")
+					.card
+						.introduction(v-html="assessment.introduction")
+				#stage2_4(v-if="stage==2 || stage==4")
+					if assessment.time > 0
+						.card
+							.timer.center(v-if="stage==2") {{ countdown }}
+					.card
+						statements(:assessment="assessment" :student="student" :stage="stage" :inputs="inputs" @gameover="endAssessment")
+				#stage3(v-if="stage==3")
+					.card
+						.finish Exam completed &#9786; ...don't close the window!
+				#stage3_4(v-if="stage==3 || stage==4")
+					.card
+						.conclusion(v-html="assessment.conclusion")
+
+block append javascripts
+	script.
+		let assessment = !{JSON.stringify(assessment)};
+	script(src="/javascripts/assessment.js")
diff --git a/views/course-list.pug b/views/course-list.pug
new file mode 100644
index 0000000..5ab2dcf
--- /dev/null
+++ b/views/course-list.pug
@@ -0,0 +1,48 @@
+extends layout
+
+block stylesheets
+	link(rel="stylesheet" href="/stylesheets/courseList.css")
+
+block content
+	.container#courseList
+		if teacher
+			.row
+				// Modal Structure
+				#newCourse.modal
+					.modal-content
+						form(@submit.prevent="submit")
+							.input-field
+								input#code.validate(type="text" v-model="newCourse.code" autofocus required)
+								label(for="code") Code
+							.input-field
+								input#description.validate(type="text" v-model="newCourse.description" required)
+								label(for="description") Description
+					.modal-footer
+						#submit.center-align
+						a.waves-effect.waves-light.btn(href="#!" @click="addCourse()")
+							span Submit
+							i.material-icons.right send
+		.row
+			.col.s12.m10.offset-m1.l8.offset-l2.xl6.offset-xl3
+				.card
+					if teacher
+						// Modal Trigger
+						.center-align
+							a.waves-effect.waves-light.btn.modal-trigger(href="#newCourse") New course
+					table
+						thead
+							tr
+								th Code
+								th Description
+						tbody
+							tr.course(v-for="course in courseArray" @click.left="redirect(course.code)" @contextmenu.prevent="deleteCourse(course)")
+								td {{ course.code }}
+								td(v-html="course.description")
+
+block javascripts
+	script(src="/javascripts/courseList.js")
+	script(src="/javascripts/utils/validation.js")
+	script.
+		let courseArray = !{JSON.stringify(courseArray)};
+		const initials = "#{initials}";
+		const admin = #{teacher};
diff --git a/views/course.pug b/views/course.pug
new file mode 100644
index 0000000..16552ce
--- /dev/null
+++ b/views/course.pug
@@ -0,0 +1,197 @@
+extends withQuestions
+
+block append stylesheets
+	link(rel="stylesheet" href="/stylesheets/course.css")
+
+block content
+	.container#course
+		if teacher
+			#newAssessment.modal
+				.modal-content
+					form(@submit.prevent="addAssessment")
+						.input-field
+							input#assessmentName(type="text" v-model="newAssessment.name" required)
+							label(for="assessmentName") Name
+				.modal-footer
+					.center-align
+						a.waves-effect.waves-light.btn(href="#!" @click="addAssessment()")
+							span Submit
+							i.material-icons.right send
+			#assessmentSettings.modal
+				.modal-content
+					form
+						p
+							input#active(type="checkbox" v-model="assessment.active")
+							label(for="active") Active
+						p
+							input#secure(name="status" type="radio" value="secure" v-model="assessment.mode")
+							label(for="secure") Exam mode, secured (class only)
+						p
+							input#exam(name="status" type="radio" value="exam" v-model="assessment.mode")
+							label(for="exam") Exam mode, free (class only)
+						p
+							input#open(name="status" type="radio" value="open" v-model="assessment.mode")
+							label(for="open") Open to everyone
+						p
+							input#fixed(type="checkbox" v-model="assessment.fixed")
+							label(for="fixed") Fixed questions order
+						p
+							input#displayOne(name="display" type="radio" value="one" v-model="assessment.display")
+							label(for="displayOne") One question at a time
+						p
+							input#displayAll(name="display" type="radio" value="all" v-model="assessment.display")
+							label(for="displayAll") Display all questions
+						.input-field
+							input#time(type="number" v-model.number="assessment.time")
+							label(for="time") Time (minutes)
+				.modal-footer
+					.center-align
+						a.modal-action.modal-close.waves-effect.waves-light.btn-flat(href="#!") Done
+			#assessmentEdit.modal
+				.modal-content
+					form
+						.input-field
+							textarea#introduction.materialize-textarea(v-model="assessment.introduction")
+							label(for="introduction") Introduction
+						.input-field
+							textarea#assessmentEdition.materialize-textarea(v-model="assessmentText")
+							label(for="assessmentEdition") Assessment in text format
+						.input-field
+							textarea#conclusion.materialize-textarea(v-model="assessment.conclusion")
+							label(for="conclusion") Conclusion
+				.modal-footer
+					.center-align
+						a.modal-action.modal-close.waves-effect.waves-light.btn-flat(href="#!") Done
+			#gradeSettings.modal
+				.modal-content
+					form(@submit.prevent="computeGrades")
+						.input-field
+							input#points(type="number" v-model.number="settings.totalPoints" required)
+							label(for="points") Total points
+						p
+							input#partial(type="checkbox" v-model="settings.halfPoint")
+							label(for="partial") Half point for partial answers? (&ge; 50%)
+						p
+							input#malus(type="checkbox" v-model="settings.zeroSum")
+							label(for="malus") Lose points on wrong answers? ("Zero-sum" game)
+				.modal-footer
+					.center-align
+						a.modal-action.modal-close.waves-effect.waves-light.btn(href="#!" @click="computeGrades()")
+							span Compute
+							i.material-icons.right send
+			#detailedGrades.modal
+				.modal-content
+					table
+						thead
+							tr
+								th Number
+								th(v-for="assessment in assessmentArray") {{ assessment.name }}
+						tbody
+							tr.grade(v-for="student in studentList(group)")
+								td {{ student.number }}
+								td(v-for="(assessment,i) in assessmentArray" @click="togglePresence(student.number,i)") {{ grade(i,student.number) }}
+				.modal-footer
+					.center-align
+						a.modal-action.modal-close.waves-effect.waves-light.btn-flat(href="#!") Close
+		.row(v-show="mode=='view'")
+			.col.s12.m10.offset-m1.l8.offset-l2.xl6.offset-xl3
+				if teacher
+					h4.title(@click="toggleDisplay('students')") Students
+					.card(v-show="display=='students'")
+						.center-align
+							input.hide#upload(type="file" @change="upload")
+							button.on-left.waves-effect.waves-light.btn(@click="uploadTrigger()") Import
+						table
+							thead
+								tr
+									th Number
+									th Forename
+									th Name
+									th Group
+							tbody
+								tr.student(v-for="student in studentList(0)")
+									td {{ student.number }}
+									td {{ student.forename }}
+									td {{ student.name }}
+									td {{ student.group }}
+				h4.title(@click="toggleDisplay('assessments')") Assessments
+				.card(v-show="display=='assessments'")
+					if teacher
+						.center-align
+							a.on-left.waves-effect.waves-light.btn.modal-trigger(href="#newAssessment") New assessment
+							input#password(type="password" v-model="monitorPwd" @keyup.enter="setPassword" placeholder="Password" title="Monitoring password")
+					table
+						thead
+							tr
+								th Name
+								th Coefficient
+								th #Questions
+								th Time
+						tbody
+							tr.assessment(v-for="(assessment,i) in assessmentArray" @click.left="actionAssessment(i)" @contextmenu.prevent="deleteAssessment(assessment)")
+								td {{ assessment.name }}
+								td {{ assessment.coefficient }}
+								td {{ assessment.questions.reduce( (a,b) => { return b.active ? a+1 : a; }, 0) }}
+								td {{ assessment.time }}
+				if teacher
+					h4.title(@click="toggleDisplay('grades')") Grades
+					.card(v-show="display=='grades'")
+						.center-align
+							button.on-left.waves-effect.waves-light.btn(@click="gradeSettings()") Settings
+							a#download.hide(href="#" ref="download")
+							button.waves-effect.waves-light.btn(@click="download") Download
+						ul.tabs.tabs-fixed-width
+							li.tab
+								a(href="#group0") All
+							li.tab(v-for="group in groupList()")
+								a(:href="groupId(group,'hash')") G.{{ group }}
+						table.result(:id="groupId(group)" v-for="group in [0].concat(groupList())" @click="showDetails(group)")
+							thead
+								tr
+									th Number
+									th Forename
+									th Name
+									th Final
+							tbody
+								tr.grade(v-for="student in studentList(group)")
+									td {{ student.number }}
+									td {{ student.forename }}
+									td {{ student.name }}
+									td grade...
+									//td {{ grades[student.number].final }}
+								tr.stats
+									td(colspan="4") Stats: range= stdev= mean=
+		if teacher
+			.row(v-show="mode=='edit'")
+				.col.s12.m10.offset-m1.l8.offset-l2.xl6.offset-xl3
+					h4 {{ assessment.name }}
+					.card
+						.center-align
+							button.waves-effect.waves-light.btn.on-left(@click="materialOpenModal('assessmentSettings')") Settings
+							button.waves-effect.waves-light.btn.on-left(@click="materialOpenModal('assessmentEdit')") Content
+							button.waves-effect.waves-light.btn(@click="redirect(assessment.name)") View
+						#questionList
+							.introduction(v-html="assessment.introduction")
+							.question(v-for="(question,i) in assessment.questions" :class="{questionInactive:!question.active}")
+								.wording(v-html="question.wording")
+								.option(v-for="(option,j) in question.options" :class="{choiceCorrect:question.answer.includes(j)}" v-html="option")
+								p
+									input(:id="checkBoxFixedId(i)" type="checkbox" v-model="question.fixed")
+									label.on-left(:for="checkBoxFixedId(i)") Fixed
+									input(:id="checkBoxActiveId(i)" type="checkbox" v-model="question.active")
+									label(:for="checkBoxActiveId(i)") Active
+							.conclusion(v-html="assessment.conclusion")
+						.center-align
+							button.waves-effect.waves-light.btn.on-left(@click="mode='view'") Cancel
+							button.waves-effect.waves-light.btn(@click="updateAssessment") Send
+
+block append javascripts
+	script(src="//cdnjs.cloudflare.com/ajax/libs/PapaParse/4.3.6/papaparse.min.js")
+	script(src="/javascripts/utils/sha1.js")
+	script(src="/javascripts/utils/validation.js")
+	script.
+		let assessmentArray = !{JSON.stringify(assessmentArray)};
+		const course = !{JSON.stringify(course)};
+		const initials = "#{initials}";
+		const admin = #{teacher};
+	script(src="/javascripts/course.js")
diff --git a/views/enable-js.pug b/views/enable-js.pug
new file mode 100644
index 0000000..f05a445
--- /dev/null
+++ b/views/enable-js.pug
@@ -0,0 +1,4 @@
+extends layout
+
+block content
+	p.warn Javascript must be enabled. Change settings, and reload exam page.
diff --git a/views/error.pug b/views/error.pug
new file mode 100644
index 0000000..2baa3e2
--- /dev/null
+++ b/views/error.pug
@@ -0,0 +1,11 @@
+doctype html
+html
+
+	head
+		meta(charset="utf-8")
+		title Error
+
+	body
+		h1= message
+		h2= error.status
+		pre #{error.stack}
diff --git a/views/index.pug b/views/index.pug
new file mode 100644
index 0000000..70ac099
--- /dev/null
+++ b/views/index.pug
@@ -0,0 +1,19 @@
+extends layout
+
+block stylesheets
+	link(rel="stylesheet", href="/stylesheets/index.css")
+
+block content
+	.container
+		.row
+			.card.col.s12.m8.offset-m2.l6.offset-l3.xl4.offset-xl4
+				table
+					thead
+						tr
+							th Name
+							th Forename
+					tbody
+						each user in userArray
+							tr.teacher(onClick="document.location.href='/" + user.initials+ "'")
+								td= user.name
+								td= user.forename
diff --git a/views/layout.pug b/views/layout.pug
new file mode 100644
index 0000000..a547638
--- /dev/null
+++ b/views/layout.pug
@@ -0,0 +1,60 @@
+doctype html
+html(lang="en")
+
+	head
+		meta(charset="UTF-8")
+		title qomet - #{title}
+		meta(name="viewport", content="width=device-width, initial-scale=1")
+		link(rel="stylesheet", href="//fonts.googleapis.com/icon?family=Material+Icons")
+		link(rel="stylesheet", href="//cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/css/materialize.min.css")
+		link(rel="stylesheet" href="/stylesheets/layout.css")
+		// favicon:
+		link(rel="apple-touch-icon", sizes="180x180", href="/favicon/apple-touch-icon.png")
+		link(rel="icon", type="image/png", sizes="32x32", href="/favicon/favicon-32x32.png")
+		link(rel="icon", type="image/png", sizes="16x16", href="/favicon/favicon-16x16.png")
+		link(rel="manifest", href="/favicon/manifest.json")
+		link(rel="mask-icon", href="/favicon/safari-pinned-tab.svg", color="#5bbad5")
+		link(rel="shortcut icon", href="/favicon/favicon.ico")
+		meta(name="msapplication-config", content="/favicon/browserconfig.xml")
+		meta(name="theme-color", content="#ffffff")
+		// -- end favicon
+		block stylesheets
+
+	body
+
+		header
+			// Top-left menu
+			button#leftButton.dropdown-button.btn.btn-floating.btn-large.waves-effect.waves-light.grey(data-activates="leftMenu" data-constrainwidth="false")
+				i.material-icons menu
+			ul#leftMenu.userMenu.dropdown-content
+				li
+					a(href="/")
+						i.material-icons home
+						span Home
+				if loggedIn
+					li
+						a(href="/" + myInitials)
+							i.material-icons question_answer
+							span Courses
+				li.divider
+				if loggedIn
+					li
+						a(href="/logout")
+							i.material-icons power_settings_new
+							span Logout
+				else
+					li
+						a(href="/login")
+							i.material-icons account_box
+							span Login
+			block rightMenu
+
+		main
+			block content
+
+		script(src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js")
+		script(src="//code.jquery.com/jquery-3.2.1.min.js")
+		script(src="//cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/js/materialize.min.js")
+		script(src="//cdnjs.cloudflare.com/ajax/libs/vue/2.5.2/vue.js")
+		script(src="/javascripts/utils/socketMessages.js")
+		block javascripts
diff --git a/views/login.pug b/views/login.pug
new file mode 100644
index 0000000..215f83f
--- /dev/null
+++ b/views/login.pug
@@ -0,0 +1,33 @@
+extends layout
+
+block stylesheets
+	link(rel="stylesheet", href="/stylesheets/login.css")
+
+block content
+	.container#login
+		.row
+			.col.s12.m8.offset-m2.l6.offset-l3.xl4.offset-xl4
+				.card#form
+					form(@submit.prevent="submit")
+						.input-field
+							input#email.validate(type="email", ref="userEmail", v-model="user.email", required)
+							label(for="email") Email
+						.input-field(v-show="stage=='register'")
+							input#forename.validate(type="text", v-model="user.forename", :required="stage=='register'")
+							label(for="forename") Forename
+						.input-field(v-show="stage=='register'")
+							input#name.validate(type="text", v-model="user.name", :required="stage=='register'")
+							label(for="name") Name
+						#submit.center-align
+							button#submit.waves-effect.waves-light.btn(@click.prevent="submit")
+								span {{ messages[stage] }}
+								i.material-icons.right send
+						#toggle.center-align
+							span(v-show="stage!='login'", @click="toggleStage('login')") Login
+							span(v-show="stage!='register'", @click="toggleStage('register')") Register
+				.card#dialog.hide
+
+block javascripts
+	script(src="/javascripts/utils/dialog.js")
+	script(src="/javascripts/utils/validation.js")
+	script(src="/javascripts/login.js")
diff --git a/views/monitor.pug b/views/monitor.pug
new file mode 100644
index 0000000..e5dadfe
--- /dev/null
+++ b/views/monitor.pug
@@ -0,0 +1,12 @@
+extends withQuestions
+
+	//TODO: step 1: ask password (client side, store hash)
+	// step 2: when got hash, send request (with hash) to get monitoring page:
+	//   array with results + quiz details (displayed in another tab) + init socket (with hash too)
+	//   buttons "start quiz" and "stop quiz" for teacher only: trigger actions (impacting sockets)
+
+	body
+		p TODO
+
+block append javascripts
+	script. TODO
diff --git a/views/no-devtools.pug b/views/no-devtools.pug
new file mode 100644
index 0000000..bdc6021
--- /dev/null
+++ b/views/no-devtools.pug
@@ -0,0 +1,5 @@
+extends layout
+
+block content
+	p.warn Devtools is forbidden during an exam. Exit devtools and go back to exam page.
+	p.warn NOTE: if the exam was started already, then you cannot resume it :/
diff --git a/views/withQuestions.pug b/views/withQuestions.pug
new file mode 100644
index 0000000..e835911
--- /dev/null
+++ b/views/withQuestions.pug
@@ -0,0 +1,20 @@
+extends layout
+
+block stylesheets
+	link(href="/vendor/prism/prism.css" rel="stylesheet")
+
+block javascripts
+	script(src="/vendor/prism/prism.js")
+	script.
+		Prism.plugins.autoloader.languages_path = '/vendor/prism/components';
+	script(type="text/x-mathjax-config").
+		MathJax.Hub.Config({
+			extensions: ["tex2jax.js"],
+			jax: ["input/TeX", "output/SVG"],
+			tex2jax: {
+				inlineMath: [ ['$','$'] ],
+				displayMath: [ ['$$','$$'] ],
+				processEscapes: true
+			},
+		});
+	script(src='//cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js')
-- 
2.44.0